Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ade9b9b33cc1a…

MALICIOUS

PDF

37.9 KB Created: 2020-08-02 02:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d9d1c43fd812a6448c0f818dc14833e SHA-1: 8440b132b5c54f20d0d9bd965af8f10b50a8349c SHA-256: 7c0ade9b9b33cc1a84db26a72445d0bc1a375bd8f882716f5786e6224b68cc4c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=vijay+tv+serials+promo+this+week'. Additionally, another critical heuristic indicates a PDF link farm, with numerous links hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and embedded URLs, reinforcing the malicious intent.

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=vijay+tv+serials+promo+this+week
    • http://files.schematherapycanberra.com.au/uploads/1/3/1/3/131383771/76303e.pdf
    • http://files.en.hancbass-greaterswiss.com/uploads/1/3/1/6/131636625/1248662.pdf
    • http://files.worklinkvas.com/uploads/1/3/1/4/131406075/8812986.pdf
    • http://files.mieswholesalemeats.com/uploads/1/3/0/7/130739415/97bf9ed13682.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/87815177030.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/66175486825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/90843315794.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/40678325510.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1559/files/16589862839.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/tixafiwiriza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/35690786909.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/sesupixovarilimumitenak.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/sununutozoxonamotezefukev.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/gadorotom.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/rulogepesek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a2f.bin
4a37456300ee88a566cb04b1666f1501e329fe4367c85f0b2b0c90c6a3bc4898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2F 5100 bytes
font_01_sfnt_off00005ba2.bin
b4219fa856a139bddb353f30033f995e80ff8ccaa45c67e01b2c5d5495d41986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA2 9696 bytes
font_02_sfnt_off00007cbc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 4324 bytes

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