Malicious PDF — malware analysis report

Static analysis result for SHA-256 7accd36d0cd27e49…

MALICIOUS

PDF

44.0 KB Created: 2020-08-16 20:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfce1165f037eb2999f3bb87576fab89 SHA-1: db1b94380d9203eb4195ae442fb5c7490d1c748f SHA-256: 7accd36d0cd27e49a14ece0f94b2ba5c071db3aa0da6c8fb44ef265afbfd1013
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially compromised Shopify domains further supports a link-farming or redirection attack pattern.

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=define+rows+and+columns+in+spreadsheet
    • http://vosaxubi.edible-s.com/uploads/1/3/2/6/132681393/5921072.pdf
    • http://files.keepitrealministriesd.org/uploads/1/3/0/8/130814636/33ff084.pdf
    • http://files.ellenaltjudaic.com/uploads/1/3/2/7/132740598/vewuruj.pdf
    • http://files.almaguinadultlearning.org/uploads/1/3/1/6/131637529/kuponavebenot.pdf
    • http://files.huayhuashalpinecircuit.com/uploads/1/3/2/6/132681887/wuxedikuzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/xifepuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/kusudozakafekalunepe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/vojowe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/wodawagawawukujorug.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/general_biochemistry_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/graduation_ceremony_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/mofozaxupobotaravubiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/xapubewaxemak.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/wevusas.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/lalofimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5256/files/petrografi_batuan_sedimen.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/55494271566.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c09.bin
a330029fdaa88bc27036cf0522abf8a278ae397ac3255b9078e7d609becaa280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C09 5484 bytes
font_01_sfnt_off00007e9a.bin
5d007139d7388a99fab47e3d240f499b463d7ec822ece4202459c3fc920de13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9A 10620 bytes

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