Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b929844ebdda452…

MALICIOUS

PDF

34.9 KB Created: 2020-08-13 03:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5baf02165272460d757c5aed6eeebd SHA-1: 4545797a318265db32d5f61a2debcc07220453e9 SHA-256: 6b929844ebdda452328325dec505d5d75d894c48d7cb3678b92ef150c616abee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to mimic legitimate PDF files hosted on Shopify. However, one of the primary links redirects to a known malicious redirector infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=aptis+listening+test+pdf
    • http://files.bpwkw.ca/uploads/1/3/0/7/130739348/temubes_newinijil.pdf
    • http://kavasanuv.ciberkuba.net/uploads/1/3/2/3/132302978/mupebarifejodo.pdf
    • http://files.highlandspirittours.co.uk/uploads/1/3/1/8/131856476/3890820.pdf
    • http://files.constantpodcast.com/uploads/1/3/1/8/131856827/pafemunilov_dununumo_mopemosutirusa_limevasaleragip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/presto_griddle_pancake_temperature.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/reporter_amharic_news_archive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/40271253986.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/raligene.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/gimasubazuxivojunek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/kiwikatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3675/files/secondary_alveolar_bone_grafting.pdf
    • https://cdn.shopify.com/s/files/1/0437/2286/6839/files/sorevesabipujesisoxaluku.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/fokifodipemuja.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/jipejetuge.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/wopugizujiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/administrao_pblica.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_off00004c3f.bin
76d89eb1ccf469b4886a7f6dd9b4f71caae879712a5307fe8cafccc97336ded4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3F 4892 bytes
font_01_sfnt_off00005cf9.bin
fde2b2025687f262fe38eaf6668dcbbcc370ecb591650ee013ef7e2e628b37c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF9 9896 bytes

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