Malicious PDF — malware analysis report

Static analysis result for SHA-256 751c2c22a0dd81f1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 02:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd431be7f3315f1c3efc462a394d1de5 SHA-1: 9835e0a33721deb4a8c0e6b2b71d024a248717e8 SHA-256: 751c2c22a0dd81f129d5515fe8561c05606946fc6ff431f5a4724e65f1d4555c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector, identified as 'ttraff.cc'. This redirector is likely used to obscure the final destination, which could be a phishing page or a malware download. The document body, though heavily obfuscated, contains text that attempts to mimic a legitimate document, such as 'Sample agreement form for lending money', combined with urgency lures, suggesting a social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=sample+agreement+form+for+lending+money In PDF document text
    • http://files.working4god.org/uploads/1/3/0/8/130874210/104be7.pdfIn PDF document text
    • http://files.w-here2stay.org/uploads/1/3/1/0/131070718/runalotada_tigiribuzobare.pdfIn PDF document text
    • http://luvoxig.formlessmcr.com/uploads/1/3/0/8/130874359/e1e9094b61d42.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/1/0429/7926/2615/files/25400431103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/72669048581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9538/3461/files/91674523734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/kogolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/bakuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/bifakexomobifovawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/fallout_4_ign_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/animator_app_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/xidinarelabufaziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9190/1081/files/fimew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/novosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6546/5245/files/probability_theory_and_mathematical_statistics_by_marek_fisz_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/91231678375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/visegowi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B2 5388 bytes
SHA-256: bd334dbd6f5bf2034022ae401335a5ed1ff0e41c722ceb807792b17ef4c8f510
font_01_sfnt_off000086ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 9912 bytes
SHA-256: 460a01171496067f0549d78f8b199e43c3bbbe66eb8290d0fdcb83fd39787fa9