Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04cd3fcd4042ae5…

MALICIOUS

PDF

36.3 KB Created: 2020-08-04 04:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43d7209be6bf6ff8de7c20f49c8f5954 SHA-1: 786512d18630e9cea5d4b9318e69f464e8c12d69 SHA-256: c04cd3fcd4042ae5b9d86927a0390368d275d793b4c05e609d7e144bc4106031
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' heuristic further supports the lure. The primary malicious URL is ttraff.cc, which is known to host malicious redirects.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vocabulary+building+with+antonyms+synonyms+homophones+and+homographs+pdf
    • http://fimidus.lsdyoung.com/uploads/1/3/0/9/130969426/51f031.pdf
    • http://files.nataliemangalindandesign.com/uploads/1/3/0/7/130738597/nisewuluzo-zavetotozosib.pdf
    • http://files.mammaonline.co.uk/uploads/1/3/1/3/131378993/210041.pdf
    • http://files.bellinfischer.de/uploads/1/3/1/1/131164479/seboja-dovowixadalil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/70172928105.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/remington_mod_742.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/36889741501.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/xijini.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/88782157838.pdf
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/4052217985.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/31388308148.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/poxaziwadujijun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/rubitixudumujedabapetoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/paint_shop_pro_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/52582328362.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/jojesofifuvubopuxalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/54522220540.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_off00004c53.bin
7b879f75d3d42509d76105b85ed38b686882c707bca4d0a1469f2f0c3d65dae1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C53 5868 bytes
font_01_sfnt_off0000603d.bin
f3aa748066774ec64594688dd7dde2bc208e72507ffb457257c94ad06fd1d690
pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 10272 bytes