Malicious PDF — malware analysis report

Static analysis result for SHA-256 52293355e99f71be…

MALICIOUS

PDF

34.1 KB Created: 2020-08-23 15:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97e054669664ec947cb29974e05f5a48 SHA-1: 699e29c8d207a74748ca3a241f084b367f2353f5 SHA-256: 52293355e99f71be492f15cc7a4475606f4090b91f4960061a46a70ea61bfc16
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDF files hosted on Shopify. One of the primary links redirects to a known malicious infrastructure at ttraff.ru. The document body contains garbled text but also includes the suspicious URL and several other PDF links, reinforcing the SEO link farm and redirector attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=afinador+de+cuatro+venezolano+apk
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdf
    • http://files.alphasevenpoints.org/uploads/1/3/1/6/131636946/be576.pdf
    • http://files.expertrealtyllc.com/uploads/1/3/0/9/130968943/feb8a440.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/jerefowuxigovofamusel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/81056524542.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/91527431056.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/sutevutoxutelaxigin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/pojuwibemam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/41339026162.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/wezojosipidobusok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/belt_conveyor_design_project.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/67480627468.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/zododot.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_off000047de.bin
14fc2d99200d77b3754842b5f97c43f26549c90e5aee7466169c49ab9cd9c9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47DE 5136 bytes
font_01_sfnt_off00005972.bin
3cafd391785820afb28496ddf5a7c1453463fcd839b44018aa0d3b3ff8f7be61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5972 10448 bytes

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