Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9f2324d319b9f0…

MALICIOUS

PDF

42.1 KB Created: 2020-08-07 22:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aff30e0a3983a6782378cc289e6287a SHA-1: d90aa98161c9bcbbca7386469312248376660934 SHA-256: 2b9f2324d319b9f093594b0b2cabf046a5bbaa2e79a8e6b18aabbcfd7aa72350
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, mentions 'cheat codes of gta san andreas pdf download' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

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=cheat+codes+of+gta+san+andreas+pdf+download
    • http://files.hangmangallery.com/uploads/1/3/2/6/132695200/juminolezapozajapu.pdf
    • http://files.liquidsunshine2u.com/uploads/1/3/1/3/131382032/b4616fc.pdf
    • http://files.thomascandlishmusic.com/uploads/1/3/1/8/131871984/letopim_ruzuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9730/6776/files/guwaladiwijaruvavawofumad.pdf
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/github_discord_webhook.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/manual_de_ortopedia_maxilar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/97761839633.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/53472052615.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/18918143926.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/laralopazeruvokewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/makudosetilovajum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/33175926604.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/14075586479.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/vofejoberama.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_off000066cc.bin
46a8a2ccea1da972dfe80dadb8cb1d9eadb730e83d16a1fb79962f4a4b8573f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5416 bytes
font_01_sfnt_off00007943.bin
eb143f53f6e7e938502dca63a6e4ee9eeb6d07ceb705f6f25b1bfaecd2d0dccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 10048 bytes