Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7be43afde80d26…

MALICIOUS

PDF

55.0 KB Created: 2020-09-18 02:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04c80ee7614d97d32ec393f0f83cb336 SHA-1: 2b355f9ad1ac842aa14322f05f0e40e8b2ff0e39 SHA-256: 1f7be43afde80d26d8ee21d8b42493b3fdea5c39af6e7e194b87c473cedceb31
192 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF link farm'. One critical heuristic indicates these links point to known malicious redirector infrastructure, specifically `https://ttraff.club/wix?keyword=best+personal+loans+yahoo+answers`. The document body, though heavily obfuscated, also contains this URL, suggesting a lure related to personal loans. The presence of numerous links to external PDFs, many hosted on suspicious domains, further supports the attack pattern of redirecting users to malicious content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=best+personal+loans+yahoo+answers In PDF document text
    • http://files.firststatebaptist.com/uploads/1/3/2/6/132681824/3383757.pdfIn PDF document text
    • http://files.michaeljeffress.com/uploads/1/3/0/7/130776067/211667.pdfIn PDF document text
    • http://kumezodez.felicityj.com/uploads/1/3/1/4/131452816/girop.pdfIn PDF document text
    • http://tosowub.vtfbla.org/uploads/1/3/2/7/132712615/ruzuwuforadaso-xozomufi.pdfIn PDF document text
    • http://xisizozaw.mathsinquiry.com/uploads/1/3/0/7/130775951/rirozuz.pdfIn PDF document text
    • http://nogov.mx.plumasfiresafe.org/uploads/1/3/1/4/131452917/kezuwatiji.pdfIn PDF document text
    • http://files.deltabluesfestival.net/uploads/1/3/1/3/131398504/redek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df993517-206f-41b2-8c50-87097bdb6f68.filesusr.com/ugd/2d797c_057a72bbc4b74929b0a8d101f5f58020.pdf?index=trueIn PDF document text
    • https://f4fa503d-562d-4513-a153-c9400fc68714.filesusr.com/ugd/f80014_77f2ecf6027541c9921f1ae14bbd1217.pdf?index=trueIn PDF document text
    • https://af0665ce-f27c-443d-a731-8ef713fc1191.filesusr.com/ugd/9f6a24_3ce1f15653a342cfbbd5982dc045d4da.pdf?index=trueIn PDF document text
    • https://d7aad214-41fe-4400-bbab-492d56b43bca.filesusr.com/ugd/e42c35_2e70b9e4b0684b7d96e8281a6e43a760.pdf?index=trueIn PDF document text
    • https://d030276c-7b50-45dc-8bfd-cbfc0d7fd8f4.filesusr.com/ugd/37321e_41c85ef0d88d41edb97d6484e82ebf11.pdf?index=trueIn PDF document text
    • https://14fec5c5-2eac-40b8-9f84-e415a7aa3cf7.filesusr.com/ugd/808cd0_736614e0c9c8446da9a7ac0a5264cb48.pdf?index=trueIn PDF document text
    • https://368f29c5-e995-459b-be4a-504fb4c59ac6.filesusr.com/ugd/5de1df_25f98029733341babc0d20b7a9bb3ec4.pdf?index=trueIn PDF document text
    • https://243e0c63-ad2c-4a8c-b2db-ae015a159f19.filesusr.com/ugd/ff68bb_1502b75db6d14bb39708b526de859696.pdf?index=trueIn PDF document text
    • https://c269a085-50e3-489c-bb1c-a705c88623f1.filesusr.com/ugd/fe0276_30f86ce5f1a24931bc22d8c909a36199.pdf?index=trueIn 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_off0000990d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x990D 5152 bytes
SHA-256: 5c1f601be7fbc63aa91e68779c065be7abf12bac1c336a22265f304f4945c0d7
font_01_sfnt_off0000aaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA3 10620 bytes
SHA-256: 19936f2a257cb04418a01d30e590762d1d38ba8f9a88fc67612d2ffe0065b945