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)
MD5: bd431be7f3315f1c3efc462a394d1de5 SHA-1: 9835e0a33721deb4a8c0e6b2b71d024a248717e8 SHA-256: 751c2c22a0dd81f129d5515fe8561c05606946fc6ff431f5a4724e65f1d4555c
162 Risk Score

Malware Insights

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

This PDF document contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=sample+agreement+form+for+lending+money', which is flagged as a malicious redirector. The presence of numerous links to PDF files hosted on Shopify suggests an attempt to obscure the final malicious destination and potentially leverage SEO techniques for distribution.

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.
  • 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
    • http://files.working4god.org/uploads/1/3/0/8/130874210/104be7.pdf
    • http://files.w-here2stay.org/uploads/1/3/1/0/131070718/runalotada_tigiribuzobare.pdf
    • http://luvoxig.formlessmcr.com/uploads/1/3/0/8/130874359/e1e9094b61d42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/25400431103.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/72669048581.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3461/files/91674523734.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/kogolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/bakuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/bifakexomobifovawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/fallout_4_ign_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/animator_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/xidinarelabufaziv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9190/1081/files/fimew.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/novosu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6546/5245/files/probability_theory_and_mathematical_statistics_by_marek_fisz_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/91231678375.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/visegowi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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