Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbabd837f41e0956…

MALICIOUS

PDF

52.1 KB Created: 2020-07-28 01:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 266c613bb2ccde40606b63259250475e SHA-1: 7d355a9219b29987eacaf9bde75ef0c43aeb6433 SHA-256: fbabd837f41e09569294a0acd33e17630c467140689321cf44e1299966a7c5f7
130 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDF documents, a common tactic for SEO poisoning and distributing malicious content. One of the embedded links, 'https://ttraff.ru/pify?keyword=acrokeratosis+verruciformis+of+hopf+pathology', is identified as a malicious redirector. The presence of a 'download button' heuristic further supports the intent to trick users into downloading further payloads. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=acrokeratosis+verruciformis+of+hopf+pathology
    • http://files.brokenwcowboygear.com/uploads/1/3/1/3/131384401/4922141.pdf
    • http://files.skipsisters.co.uk/uploads/1/3/1/3/131383314/76c0b345ec866.pdf
    • http://files.lco-team.com/uploads/1/3/1/1/131164020/26331.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/37295374829.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/bibesufunufeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/gifoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/namulafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/15117220537.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/xuzakazoginolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/pawejatogiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/30001629491.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/getelunixazigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/44548175894.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/87196274797.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/30305621725.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/57789713724.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/wozeruka.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_off00008d34.bin
63baa1308738c6ba8deb37910e825f3f8c4ebf1c1aed9a90a61b019708b7d1d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D34 5420 bytes
font_01_sfnt_off00009fb7.bin
0e2d588c996e5a3bd7382351c476861a8aefb2a71d41908ce22b26f199e0d029
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB7 10272 bytes