Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f55b8e2e4c54bb0…

MALICIOUS

PDF

33.8 KB Created: 2020-08-15 07:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b52f26e9803b254559c86dde82670f83 SHA-1: 8bd143f800405b996fb3e28ce5ae6195e9d7bbfb SHA-256: 7f55b8e2e4c54bb0691ff10483854df3a90055556d5bec232dc2c7aed5f64c60
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same redirector URL. This indicates a likely phishing or scam attempt using a link farm to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=fortnite+battle+royale+mobile+ios
    • http://kuvezujis.lewisgabbmusic.com/uploads/1/3/1/3/131384429/3130919.pdf
    • http://wisizabaw.ogdenblinds.com/uploads/1/3/1/6/131606490/befotawejujajoka.pdf
    • http://ginixe.anaprojectprep.org/uploads/1/3/0/9/130969868/bowilomam.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/latepim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/bezusodudixomebekogez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/hernia_de_disco_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6776/7972/files/theories_of_oxidative_phosphorylation.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/54021845756.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/abacus_level_7_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/16789877193.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/96387436226.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/sanawexozejoguwerotep.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/60598025075.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/gesenuduzemibevogudisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/vapore.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/fuxavefegelasijutotas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/razipevezewaretuzisapez.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/dalesex.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_off000049b1.bin
2d2776197c602d9a50edcc83f453c413f4ad0c101429d7f06c4ef21646609915
pdf-font-stream PDF embedded font (sfnt) at offset 0x49B1 5028 bytes
font_01_sfnt_off00005ab0.bin
b97378e71bebcdbb5bf165eefd643d1a26c64015eab0c27f14935f1f445afe6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB0 9440 bytes