Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f9efe09e90768d…

MALICIOUS

PDF

66.0 KB Created: 2020-08-04 03:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a221ce0e2de09ffa4fcb09d4c0404b5b SHA-1: da1ea4d69466d4c837a6e306996aef84be36324b SHA-256: 37f9efe09e90768d721b6299540b04d42dae9fe7c23246cc1981f14dbb473ac7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as academic assignment information. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger effort to generate traffic through SEO-optimized links. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=ignou+ma+assignment+2020+19+solved+pdf In PDF document text
    • http://files.complianceandriskcompany.com/uploads/1/3/2/7/132740778/8453346.pdfIn PDF document text
    • http://files.palaceproductioncenter.com/uploads/1/3/1/3/131398145/vamime-gesagivesudage.pdfIn PDF document text
    • http://vogoxigam.klehmannphotography.com/uploads/1/3/0/7/130738748/462280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/cbse_class_10_board_exam_date_sheet_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/pedupabokalukarilesuxoxed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/kiduguka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/washington_dmv_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/liwamagolajunarixalugawox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0574/5051/files/dovanizixogatax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/install_flask_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/difodibevalotedugazoxafet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/winilevegefebukuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/west_virginia_abbreviation.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 5628 bytes
SHA-256: 6c63cb552d02b9ebdc7e9412d35cf27bf044257deb639d1db18286c3144f8efe
font_01_sfnt_off00007c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00008771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 9048 bytes
SHA-256: 3d6624cf63fb33b809054a22508861b053a221640f89da93da71fecf245d4a50
font_03_sfnt_off0000a50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA50D 10456 bytes
SHA-256: 94bc7a5931bdec7c8e2ccc41cdc77102410b681f647220435c81095c30fa68ec
font_04_sfnt_off0000c8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E3 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_05_sfnt_off0000dd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
font_06_sfnt_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 3428 bytes
SHA-256: 78407b8dbbaf7a0c6249bb6a59ad46bda651e6fcc2dc8eda88959f49fb67d039

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