Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc51c757e5bf762…

MALICIOUS

PDF

39.1 KB Created: 2020-08-22 00:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48058b6fd872c6b5e36bf1dc51205d08 SHA-1: ddae49868b1815edda537ce3072d156a4d7d6444 SHA-256: adc51c757e5bf7622345cb1518f0eec84a78477df96b0d723e4cc6fecc7547c2
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous external links, a technique often used for SEO spam or to direct users to malicious sites. One critical heuristic flagged a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=kuiu+guide+vs+first+lite+catalyst'. Another heuristic identified a large number of external PDF links, with the dominant host being cdn.shopify.com. The document body contains garbled text but also includes the malicious redirector URL and several Shopify URLs, some of which are confirmed benign while others are unknown.

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=kuiu+guide+vs+first+lite+catalyst
    • http://files.mrlennonmusic.com/uploads/1/3/1/4/131406735/zebajurakesibap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/resident_evil_2_gamecube.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/9th_class_english_textbook_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4774/files/miraculous_ladybug_season_3_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/pearson_hartley_biometrika_tables_for_statisticians.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/libofosudavinesem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/37208772159.pdf
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/guide_to_the_astral_plane.pdf
    • https://cdn.shopify.com/s/files/1/0435/8402/8833/files/48392525229.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/85897849648.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/31833226499.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/58464199806.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_off00005b19.bin
37c6b77ae820006201fc27f768aaace41a16f45d6e75103c53284915190728b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B19 5320 bytes
font_01_sfnt_off00006d4c.bin
2b91c54325c0f7e61eecff0fd0f9f4e16244a41b1e031fcc4ff395ff77a8fc61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4C 10148 bytes

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