Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73bf318a40e4366…

MALICIOUS

PDF

97.8 KB Created: 2020-08-21 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ee5001a327735ec9a3e815328551908 SHA-1: 6e55fe87f04c32c1fcc9728a8f6a596b2609e904 SHA-256: c73bf318a40e43661f69ff3f670891353ca05fe0dc0cf7c00d53d1e7842f015f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=information+about+anuradhapura+kingdom, which is also listed as an IOC. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger link farm designed to manipulate search engine results, likely to distribute malicious content. No scripts were extracted from this sample.

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=information+about+anuradhapura+kingdom In PDF document text
    • http://files.lakewoodfamilyhealth.com/uploads/1/3/1/6/131637658/jubanofuredufugedade.pdfIn PDF document text
    • http://files.philadelphialogisticscenter.com/uploads/1/3/1/1/131164476/jokimolomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0836/4444/files/apostille_texas_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/algebra_all_formulas_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/feel_good_inc_sheet_music_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/violin_arpeggios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/a_clockwork_orange_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/nusigovetute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/bodmas_rule_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/talebuvulexejemesake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/xipojanox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/suronejugutazanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1450/3075/files/mevusobasefupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/clinical_pharmacist_resume.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://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 5152 bytes
SHA-256: 6676b000553b229f6ebd8c844bd81db53be30e731bec1c840b56ac23f1862cb1
font_01_sfnt_off00011a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A53 4184 bytes
SHA-256: 4d4050bd6f32484b470ce6f90ed8c76309be57813e5d654950ff5ed045a9b1ec
font_02_sfnt_off000129c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C0 10184 bytes
SHA-256: 8e15af3f4c4c78127bda81a9bd5227b7adfe2497ecc829ffdfb34593dbf56f48
font_03_sfnt_off0001481a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1481A 10188 bytes
SHA-256: 5ce92976e90b84287d701ded0ab59faab8a47b57313c64ea46ad9090b12ac38f
font_04_sfnt_off00016aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AFF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e