Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c719eaaf58a1bc…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 17:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f6b65f2b0972c1efeee67de129515fc SHA-1: 51b8cdaaa3bde44a28b0663ee1486a168a2ef88a SHA-256: 51c719eaaf58a1bc7fde4bb1a1d172f6e6c6f3b1ebdbd3ffb7c5645d3b9718ac
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains the same lure text found in the redirector URL, suggesting a social engineering attempt to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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=chalkboard+theme+powerpoint+template In PDF document text
    • http://files.timberlinelearningcenter.com/uploads/1/3/1/4/131452750/280bfd139c90.pdfIn PDF document text
    • http://files.shearingjobs.com/uploads/1/3/1/4/131406036/gevemivizej.pdfIn PDF document text
    • http://xumadime.shieldpatterns.com/uploads/1/3/0/8/130814229/5688276.pdfIn PDF document text
    • http://files.dallasmoderne.com/uploads/1/3/2/6/132682167/502fc2607d.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/1/0434/1425/7820/files/16457889192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/ginalarurami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/91673892618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/attachment_report_sample_kenya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/logogabisuxexudajoxalifos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/zixunobakawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/probability_and_statistics_gtu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/mecanismo_de_accion_delos_antibioticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/collections_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/10597546616.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 5220 bytes
SHA-256: 355dd9cd46915c3cf55042d572116d5a158856131520daebd2055936ec053145
font_01_sfnt_off0000873d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873D 10008 bytes
SHA-256: 952704e32f0ce50838e0fd4cff2a492dc6187db338fdad7e84523167e73c1d68

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