Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecde4aced8b36b32…

MALICIOUS

PDF

49.1 KB Created: 2020-08-12 08:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b6567a5013b4f01d6ee1d6b18c04764 SHA-1: 1880b96d1c6ba1ef8db872619cf702854e2b3af7 SHA-256: ecde4aced8b36b32868cc09a56ee4265f367837be9554b3ca9cd4de42875886b
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=definition+of+aerobic+exercise+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'aerobic exercise pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious redirection. The presence of numerous links hosted on Shopify indicates a coordinated effort to distribute malicious content.

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=definition+of+aerobic+exercise+pdf
    • http://files.sportsphysioonline.com.au/uploads/1/3/0/7/130775223/5a00cb68b.pdf
    • http://files.divineoracle.org/uploads/1/3/0/7/130739778/midonepu-luvomuwaluliz-mirejoraponuga.pdf
    • http://files.fasthandyman.us/uploads/1/3/1/3/131383586/guxazorebudagib.pdf
    • http://files.lisawarns.com/uploads/1/3/0/7/130738876/piropemogogemeranid.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/jadazafejiwivalijoxela.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/posujipupisolawujitoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/7908/1894/files/zinusopejepexugikosova.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/sovuzowimavuvoxeju.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/21790589031.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/podutulakorebotem.pdf
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/catabolismo_del_nitrogeno_de_los_aminoacidos.pdf
    • https://cdn.shopify.com/s/files/1/0436/9927/3882/files/pokemon_platinum_trophy_garden.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/witepijege.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/zegozogerodujopebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/green_smoothie_detox_diet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/34136249704.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/biwirixawubokog.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_off000077a5.bin
81d49211acef66a23cee2171ab8a5b6f2825d5fa0ae9562ad8fd85654d164414
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A5 5324 bytes
font_01_sfnt_off000089cb.bin
44354cd47ef0c41a6de44ea9e0380be957052eb4ca994afcfbd56c78bd6e2c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x89CB 14856 bytes