Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac47c3c559f165b…

MALICIOUS

PDF

102.2 KB Created: 2020-08-16 18:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a613e7d702dc9f6097a7a03e004cc7 SHA-1: 2df587ac7f1c9eb7b2092a4a3ed9786a4b65e501 SHA-256: 0ac47c3c559f165badb634a0dd3c6c50622e7572d34f105c0fc114b9b04993cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying it as a redirector link pointing to 'https://ttraff.ru/pify?keyword=aunty+police+bula+legi+song'. Another critical heuristic flags it as a PDF link farm, with numerous links hosted on Shopify. The ML classifier also strongly indicated maliciousness. These findings suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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.ru/pify?keyword=aunty+police+bula+legi+song
    • http://files.danielleaugustine.com/uploads/1/3/1/4/131409794/runuzobigatomaxaxezu.pdf
    • http://files.cartime.org/uploads/1/3/1/3/131398117/9775345.pdf
    • http://files.santacruzinkandtoner.com/uploads/1/3/0/8/130813550/1f3eddbaafc.pdf
    • http://files.catseyetiedye.com/uploads/1/3/1/3/131379990/jagakanikamotuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/90271919592.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/shifty_eyes_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/fivojipidakafaruzeka.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/45901092469.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/68065556378.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/92214153779.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/detotimokufamarobuvasonup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/51011070872.pdf
    • https://cdn.shopify.com/s/files/1/0449/4170/5384/files/arifureta_light_novel_espaol.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_off00014ef4.bin
018a4457e82f378ad1baf49268a474518a4ca0b32b8fc979ba492b926432ccff
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 5236 bytes
font_01_sfnt_off000160e0.bin
3391328bedc037cd5eee6808f9bfd1ef5c4f7b7fa2c3c52cd6a87ca9a9652b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x160E0 13732 bytes