Malicious PDF — malware analysis report

Static analysis result for SHA-256 74be770ad087df44…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 05:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 596f40685f5c18001726413136e5d728 SHA-1: 7c82c7296bce4e8327fbfa949d1dfae15f8cf1f9 SHA-256: 74be770ad087df44b72ff075592690b9fb4311417ce0f1d8690a1e95a54d9eb9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/pify?keyword=african+american+music+history+pdf', suggesting a lure to a malicious site disguised as a document. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=african+american+music+history+pdf
    • http://files.gummystudios.com/uploads/1/3/0/7/130738974/lukekumologirosozosa.pdf
    • http://files.chantrydancecompany.org/uploads/1/3/0/9/130969182/regiredopib-dedixizekasa-kativafe.pdf
    • http://files.mosaicoflight.com/uploads/1/3/1/4/131438190/govewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/gifefevapasaxanebepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/zumafegemopozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3326/files/70742812138.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/wijeberojujonofapuropopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/4962510008.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/40388425219.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/24200111640.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/16123624451.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/lupovijoziw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/22361802661.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/56488786524.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_off000067ff.bin
fdb0b295e0acb0f6b22882fce2ec5cf29206fb8d11c43bf3703e8f590c4a3d48
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 5456 bytes
font_01_sfnt_off00007a71.bin
57ca13d7f131cad1f1f2dd4307848b985295a85b0469052d5846849c4499718a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A71 10304 bytes