Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c6f82d26f1b5ed…

MALICIOUS

PDF

44.8 KB Created: 2020-07-29 20:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5b9e8fcd3d3b960e110120ddc0f1606 SHA-1: cf6b819772e803f1281dbea60a7d70f0ad038a40 SHA-256: b0c6f82d26f1b5edc9d54dcfeb567d019c0688561d192a72be46d194d46dce8e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.ru'. This suggests a phishing or malware delivery attempt. The PDF also hosts a large number of external links, characteristic of a link farm, potentially for SEO manipulation or to obscure malicious destinations. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=evento+vascular+cerebral+isquemico+fisiopatologia+pdf
    • http://files.thejailmurse.com/uploads/1/3/2/6/132695200/jegusawo.pdf
    • http://files.idealdrycleaners.co.uk/uploads/1/3/2/7/132740172/zerijazenavape.pdf
    • http://files.wchqfm.com/uploads/1/3/1/4/131452950/duxoso.pdf
    • http://files.theprincesscryaries.com/uploads/1/3/0/9/130969710/4700470.pdf
    • https://cdn.shopify.com/s/files/1/0437/4007/0042/files/fumoritis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/76499348017.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demesudixagivok.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/zuledavatazoletofubeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/4787943444.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/70492386831.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/pudofisubetosowidivuvewob.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/40641534560.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/sipovogat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/69615414014.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/40314563253.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/kisekeda.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/
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000704c.bin
aecc2dbdcf654a78af15306708c39677017a65e616c37e1274fb1ba8465fd47e
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 5640 bytes
font_01_sfnt_off0000835a.bin
88b871192255ec033a661397788f45ba9bd3a07a8f5ebcc5c77fd078019b2722
pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 9984 bytes