Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a151fc19699e7a…

MALICIOUS

PDF

32.8 KB Created: 2020-08-04 18:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c26a43b1fa143acceaee63486dd801eb SHA-1: a113f142c55e7d7b493e07883554f82ce4cf09e0 SHA-256: 08a151fc19699e7a47a8f75ad678423b699daf445d70a6f20395a9beee470ab1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body text is obfuscated and likely contains further obfuscated URLs, contributing to a likely phishing or scam campaign.

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=majesty+delirious+pdf
    • http://files.inverlochhomecrew.com/uploads/1/3/1/4/131437276/kawafibuxir_rojilesaguxuro.pdf
    • http://files.diamondhomes.net/uploads/1/3/1/4/131437775/f9caf03f12.pdf
    • http://files.joshphotographer.com/uploads/1/3/0/7/130775310/258563.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/35328036072.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/reruvowekusetev.pdf
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/petsmart_coupons_grooming.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/44091695468.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5211/files/garamidovanu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/81656629731.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/vonupixudasexiveso.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/84615091398.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/baxidagigudavakesumoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/20182269305.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/9053022317.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/literally_my_life_lyrics.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_off0000449c.bin
810715e02910b3f38f636daeece68ad388f3b221245999ab54e33636c796a344
pdf-font-stream PDF embedded font (sfnt) at offset 0x449C 5216 bytes
font_01_sfnt_off00005680.bin
faf17957a9efa65102a82b4a4db47235f27ea9b07bbb06e1dba4b1bc5a9fae80
pdf-font-stream PDF embedded font (sfnt) at offset 0x5680 9440 bytes