Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fbc6ec2dd0a1c5…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 12:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6776691ad86787ec9bf865ade61a404c SHA-1: d7f86de758356e0b92e6e9322eb388cdc4182720 SHA-256: c0fbc6ec2dd0a1c541da1a79c85dca3ab28b4d01eac8a3745678ad7eab7a5b79
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used in conjunction with a search query for setting a default Gmail account on Android. This indicates a phishing or social engineering lure. No scripts were extracted from this sample.

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=set+default+gmail+account+android
    • http://mabafibag.nordoniadrama.com/uploads/1/3/0/7/130775386/zufaluv-dajivanaxot.pdf
    • http://galadarib.chachingbiz.com/uploads/1/3/1/3/131380005/6151213.pdf
    • http://files.rikkiducornet.com/uploads/1/3/1/0/131069824/c402b3c067.pdf
    • http://pukigebaz.nileswesttheatre.com/uploads/1/3/0/8/130813780/lelatisitiliru-zofojebi-begowumunulijas.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/3717458695.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/2151183140.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/84694460580.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/apprendre_le_japonais_pour_dbutant.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/2615605620.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/lipepoler.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/79282333342.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/blasphemous_collectibles_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2280/1306/files/legjobb_magyar_billentyzet_androidra.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/pdf_to_word_converter_apk4fun.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/namexusoxivumuwifawumuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.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_off00005f1b.bin
0535a9b23db232948efdb6264f45dc5aaf56569e05bfb521415596d3776f0427
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 5268 bytes
font_01_sfnt_off000070e8.bin
bd642007ac5ab68fe1542805de3f2b952d2ef08ce94d22c6867a90d3bd748aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 10512 bytes