Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c209e3efa2feba2…

MALICIOUS

PDF

53.3 KB Created: 2020-08-10 21:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e72b1d751fe9c742b1038bec2a96eefb SHA-1: 44d649f165e03437e0f3808f993f968dbb93a4e4 SHA-256: 8c209e3efa2feba29b1f3287328d87f9af10911a1449f07355637e8e7a2fddca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, with one identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=mastering+the+international+phonetic+alphabet+pdf In PDF document text
    • http://nifukuw.bathhousebasics.com/uploads/1/3/1/8/131856158/6050874.pdfIn PDF document text
    • http://luwen.tomscot.org/uploads/1/3/2/6/132681394/8107370.pdfIn PDF document text
    • http://files.edzizatrails.com/uploads/1/3/0/7/130776363/5292806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/pathfinder_advanced_race_guide_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/85677124477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/how_to_convert_mkv_to_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6921/7699/files/alternative_dispute_resolution_act_1996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/76091177430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/39270557160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6276/9302/files/rusux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/mubab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/70361748807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/rupemozasonedoner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/33238460965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/lesco_48_belt_drive_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/72838026008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/39869955814.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 5560 bytes
SHA-256: 848d3c137df020cee9c88b1a5b9236ef80c16bb2b4b8274398fc6aca3ef64bd5
font_01_sfnt_off000080ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AD 13720 bytes
SHA-256: 3b9103641572345e829719d65d9614b1e7dca7410f2dc2e1c6ebfc8addc50b99
font_02_sfnt_off0000ae0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 16836 bytes
SHA-256: 4c75516de7fd94817630f1b761b397627307ded82c92707b7c583ed622fece73