Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cb45803dcfe1a6…

MALICIOUS

PDF

55.8 KB Created: 2020-08-12 11:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f286988c8f79d4b7b00a24582e8cde SHA-1: fd814cf2aca8865dea235488747148e9c6c18c68 SHA-256: c0cb45803dcfe1a6eace6bf149fc4678f9889ae4d788e5b1d4fd93738dc51497
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=asme+sec+viii+div+3+pdf'. The document body, though heavily obfuscated, contains references to 'Asme secviii div 3 pdf' and 'wkhtmltopdf', suggesting a lure to a technical document. The presence of numerous unknown URLs further supports the malicious intent.

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.cc/pify?keyword=asme+sec+viii+div+3+pdf
    • http://vuribasu.clubdanger.com/uploads/1/3/1/3/131383544/xaduguzevibusi.pdf
    • http://fekifum.mdiforgrowth.org/uploads/1/3/1/3/131398294/nofezemejaluram_tasisoduxaxod_susaxuwaladu.pdf
    • http://files.benwahrlebaseballparks.com/uploads/1/3/0/7/130740571/lomeguvuju_damagafobi.pdf
    • http://kaxepat.patrickmurphyhomes.com/uploads/1/3/0/8/130814328/gisesoxugasadak-gizil-maponixisipofik-zomasu.pdf
    • http://vuribasu.clubdanger.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/clinical_anatomy_moore_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/gumuviti.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/vevufuniluzuwana.pdf
    • https://cdn.shopify.com/s/files/1/0439/6033/6542/files/61052526547.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/jadozepejefitila.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/lagomob.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/vosamiwuzuga.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/bohemian_rhapsody_film_script.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/pewugibefojorig.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/lepanibabafibadilanivur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70998441087.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/cataracte_congnitale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7299/files/42954659982.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_off0000932f.bin
f329c189b5a540053a53a8a493026ca28e178024ce98b1eb259317315f61c8e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x932F 5176 bytes
font_01_sfnt_off0000a4c6.bin
dcecd57d084fb8bc62fc9c949ef88e5ac39fe91a91d3c4d8fc8a0d3ac821d02e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C6 14556 bytes