Malicious PDF — malware analysis report

Static analysis result for SHA-256 866563ca374ae676…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 23:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 632529ca3514490229cfbf7efae550e9 SHA-1: bcd9b521603dbb1c0ef1604ae44b15c1bca194d2 SHA-256: 866563ca374ae676f056e95d75fe16d92041e4f34b4b527e25434aa41b57d5c5
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the payload. The document also features a large number of links to other PDFs hosted on Shopify, suggesting a link farm for SEO poisoning or to host multiple payloads. The presence of a password-protected archive lure indicates an attempt to bypass gateway security by encrypting the malicious payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=facebook+video+firefox+android In PDF document text
    • http://files.fredsgaard-classic.com/uploads/1/3/0/7/130738822/witexixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/37812193756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/bubir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/41970099108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/capa_de_la_atmosfera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4469/0337/files/sajoporexefovebaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/bangkok_bts_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/32525315170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/miloputozonodolifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/machu_picchu_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/34313976017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8203/9964/files/nimekiwivoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7254/3137/files/arc_length_calculus_problems_and_solutions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 4800 bytes
SHA-256: 409766d1c822c4e5e5324505c721430a670a989151c4b0c045bfa1df11ea0e13
font_01_sfnt_off000070e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 10084 bytes
SHA-256: 4ea75c138103f44fb236b8ef7bc8643225a91472298a00547a4af4f5c40a328a
font_02_sfnt_off0000936a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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