Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ef01d134a626e9…

MALICIOUS

PDF

53.9 KB Created: 2020-08-10 23:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db0361e370e9f068c8b7926cb31dc82 SHA-1: 137a0502338aa1581b90dcd4823b06ea09148cda SHA-256: 89ef01d134a626e98dbf1241970b686d03306e3d4b80af254240911d8d124d95
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. It also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=calisthenics+pdf+free+download', suggesting a lure for free downloads to manipulate search engine rankings. The presence of multiple unknown URLs further supports the malicious intent.

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.com/pify?keyword=calisthenics+pdf+free+download
    • http://xadigodo.alanalevandoski.com/uploads/1/3/1/4/131408738/2144082.pdf
    • http://files.ojbaa.com/uploads/1/3/0/8/130874250/donabokudakamor-sirapodimefeber-firedolupo-wujafaxinito.pdf
    • http://fagobunom.winnebagoarchersinc.com/uploads/1/3/1/6/131636855/rusazuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/aristoteles_la_politica.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/72835728195.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/2858679259.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/rupedutikomi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/98266747645.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/42622582476.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/cdc_flu_vis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/el_capitalismo_karl_marx.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/deluzudusunezasobebotat.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/51771024803.pdf
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/joxute.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_off00009513.bin
b63ac90b1e08b855d793f00204c0d1b8d7fb7464f71ce8f6c6da22e6f0141563
pdf-font-stream PDF embedded font (sfnt) at offset 0x9513 5240 bytes
font_01_sfnt_off0000a6e7.bin
56e6c80bcc9e0eb7bc9f92ed7c7d1e0eb94bcc5a8b0c96f170257a76fd534147
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E7 10580 bytes