Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcf93cb92a8f051…

MALICIOUS

PDF

35.4 KB Created: 2020-08-20 12:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b7565506a7c7b5f8e22462b2724d3a SHA-1: 9e6ef4c40d6f71d5e6bb5c6243dadfcb9352fe8f SHA-256: 6fcf93cb92a8f051353dd81a3a8b11e116f6b9ea113ba410d3538a9235811be2
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL, which is part of a link farm designed to distribute malicious files. The document body explicitly mentions "Activator win 7 32 bit" and includes a URL that appears to be a lure for downloading software. The presence of a security bypass instruction further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=activator+win+7+32+bit
    • http://files.jenniferjoseph.org/uploads/1/3/1/0/131070723/4546412.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/5494592561.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/84626149780.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/seated_overhead_press_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/manazalixejobizawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/wirutexefurozidagevepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6648/3103/files/open_google_sheet_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/46570081782.pdf
    • https://cdn.shopify.com/s/files/1/0444/3612/7911/files/aliments_riches_en_vitamine_d.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/bunaporigewanokikotuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/present_and_past_tense_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/86184412205.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_off00004d89.bin
61ee49c42a343468f1193114e61a2cce28431e04ff709d317aa8c167fe7fbbd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D89 5240 bytes
font_01_sfnt_off00005f87.bin
8594cca39207b27cf40dea071601c907e633afc94dc9b398026f0adf7db817f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 9948 bytes