Malicious PDF — malware analysis report

Static analysis result for SHA-256 550ef1a33640497d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-16 11:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b54d5e3073c87bb5e4968b840c86f2b0 SHA-1: 0e03b5f41fc4909982996d3585886c4f6bba7353 SHA-256: 550ef1a33640497d668c423c4f411b2ec273381e00561a70ad5ffa9a3c27b905
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=easy+cookbook+templates, which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains but likely serving as a cover for the malicious redirector, suggests a campaign to distribute malicious content or phishing pages.

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.com/pify?keyword=easy+cookbook+templates
    • http://files.downbeachhockey.com/uploads/1/3/0/7/130738700/7379549671.pdf
    • http://damuxiz.nigerianngo.com/uploads/1/3/2/7/132740328/jerinil_zisoxudewom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/50329381935.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/nomuwojomagelulojiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/26342552429.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/77797185611.pdf
    • https://cdn.shopify.com/s/files/1/0436/8020/2905/files/how_to_swing_trade_for_profit.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/76033730459.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/borehole_water.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/melubodakofeluforiwod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/22327595416.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0520/files/causes_and_effects_of_absenteeism_in_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/bodyboss_superfood_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/uscis_forms_by_mail.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.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_off00007362.bin
a650a5e42a7893f38f77c087b8b3708b60659592666a0c539e67eb60bc995ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 5244 bytes
font_01_sfnt_off00008530.bin
71e5a9ac559446ceaef4c77a4525f63719d4f20fb1a2eed3bc702cdf46905efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 10260 bytes

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