Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2da609c708a584…

MALICIOUS

PDF

49.3 KB Created: 2020-07-29 16:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4417a0af2c49d96b564f272dbe9c63 SHA-1: 88e409a50465fb91d2f73204ba2a1bcf08e1c8aa SHA-256: 5f2da609c708a584728055f02e017917217e646c93c29ba93b1d80d75367fad5
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was largely unreadable binary data.

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=minuetto+boccherini+pdf+piano
    • http://files.colorsforacause.org/uploads/1/3/1/4/131453221/4254787.pdf
    • http://files.twobitranchphotography.com/uploads/1/3/1/3/131397973/nupiradofarivo.pdf
    • http://files.educatorlaurawynn2.com/uploads/1/3/0/7/130775145/f612c3b80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/giwime.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/7850363364.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/gaselifixerujatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/47697856235.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/taxexezoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/povakak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/jevixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/wevuvaraw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/88201681071.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/kurejutizavofubozaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0433/files/vurawejulogomasadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/72376879453.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_off0000828e.bin
639f080b6c4b75567f364bc0bc9f696cbd017823f481ab918ccaa184480e3c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 5060 bytes
font_01_sfnt_off000093b8.bin
13d548d4cea6c914381465bc8c633f870f2e49a45e8dff46c8ca8d60cda90d07
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B8 10544 bytes