Malicious PDF — malware analysis report

Static analysis result for SHA-256 175e87cb997cec85…

MALICIOUS

PDF

56.9 KB Created: 2020-08-14 09:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8d130ef6d5aae0e1c89c3ba0025b48e SHA-1: c24a24378303932a085119382b5c9c7628334e3c SHA-256: 175e87cb997cec85a55d6ba7746c4bd6750b66f75578b9d2f3300df3aaa1d3a4
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a redirector to malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious, and the presence of urgency language further supports a phishing or scam attempt.

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.ru/pify?keyword=parental+care+in+animals+pdf
    • http://files.dccsac.org/uploads/1/3/2/7/132712129/pidosedewujoxalob.pdf
    • http://duleve.foodfightdenver.com/uploads/1/3/1/6/131637419/gasofakotuxisulas.pdf
    • http://wijuti.ottawaprayercenter.org/uploads/1/3/2/8/132814930/vufedalo.pdf
    • http://files.pembrokeactivelivingcentre.com/uploads/1/3/0/8/130814056/gofuz-widedimiviru-numiputazid-dutobaguvugi.pdf
    • http://vutikise.soifersmith.com/uploads/1/3/0/7/130738524/391057c1df12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0440/6588/2277/files/animator_s_survival_kit_by_richard_williams.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1702/files/fojirofenogibadepavavol.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/94161033740.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/lefizal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/sexizaperiximagozevaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/61961206798.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/wivamegukakixe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/bixadewaligumidezowagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/sivob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/21824932529.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/zowadorogulisigedokoleka.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2911/files/nuxigixewujovugokibowerig.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/rebawet.pdf
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/basic_accounting_entries_examples_pdf.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_off0000a091.bin
cdb4965cc074e7f691dfa005ecb84d1a067743eda0a97ffaeb80317c4e58a8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA091 5300 bytes
font_01_sfnt_off0000b277.bin
d634615499a06f2d569794af7d37898698df6ecd0f1bb5a48bd1b55b5912dc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB277 10476 bytes

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