Malicious PDF — malware analysis report

Static analysis result for SHA-256 a824c20e54811d0a…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 21:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d731d0c24679da15227aa9a2ae919b2 SHA-1: 5b5433567cd646b701942c744984f4a919fcd92e SHA-256: a824c20e54811d0a64790bf941c87565f9ab016ea09d6acb2deaf456ec60cb80
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous links to Shopify-hosted PDFs, many of which are benign, is characteristic of SEO poisoning or link farm tactics to improve search engine ranking and distribute malicious links.

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.com/pify?keyword=amino+acids+structure+and+properties+pdf
    • http://files.communityplayerstucson.org/uploads/1/3/1/3/131382395/07d052da5c746.pdf
    • http://files.thewhisperingwild.co.uk/uploads/1/3/1/6/131636825/vabug-gusevivur-gabazevola.pdf
    • http://nevup.therustywagon.org/uploads/1/3/0/8/130874038/gaxovalako.pdf
    • http://xoxiniw.stlukecdc.org/uploads/1/3/1/0/131070450/degivefal-dezax-mukilumalibexok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/is_maxthon_a_virus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/astm_e8_e8m_13a.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/90657838487.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5523/files/roresolegola.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/average_speed_and_average_velocity_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/tejegipusevinawokekena.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/lord_byron_she_walks_in_beauty_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/tefazabagunax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/brownie_household_elf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/ffmpeg_extract_frames.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/litununiwugubinefibopemi.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_off00007d86.bin
da75b64ff9e3fca755e3c853fd257d6d8ce9c4653ebd96447bf71be65ec3501d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 5260 bytes
font_01_sfnt_off00008f4f.bin
d6650f8dc4d0c951ade4f05de86d95e37c86bb743eaa038b385ac1ab6d9ca6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4F 10192 bytes

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