Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2abc5cbecd594a9…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 08:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ec98e3055c217b6ebc3c212f755ccb8 SHA-1: f50fb44189f3d07ae60c84ef2344f5cb839fb2f2 SHA-256: f2abc5cbecd594a95400928d4bfe7562016a5c385e02281f2797e653cf138aac
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure the ultimate destination. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body itself contains garbled text and what appears to be metadata, but the embedded links are the most significant indicators of malicious intent. No scripts were extracted from this sample.

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.ru/pify?keyword=gemsy+gem+8900+industrial+sewing+machine+manual
    • http://files.mmetthey.com/uploads/1/3/1/3/131380870/fowidifowupeg-gamilaxumid-fasekurodib-kekaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/nekuxezaxefutatamewosolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/dorebutorivatikufojor.pdf
    • https://cdn.shopify.com/s/files/1/0436/1450/3075/files/7701363347.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/lerave.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/acute_kidney_injury_a_guide_to_diagnosis_and_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/77195847438.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/tnlottery_play_it_again.pdf
    • https://cdn.shopify.com/s/files/1/0447/9369/2326/files/lotojamav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7317/files/container_architecture_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/74954448673.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_off000052cb.bin
07cefc5715c937cd01c0db6362dcbf441426adf19327a3af01a8a5101fa2378a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CB 6072 bytes
font_01_sfnt_off00006753.bin
a730b58e2423ba93fdf0f451bfd6f5a7cecebff157f2ef40b9b72d121abd08c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 9888 bytes

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