Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafb84509f48df09…

MALICIOUS

PDF

61.4 KB Created: 2020-08-30 12:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddccd0484af544975e0ca3613fa86852 SHA-1: b630c8632b676104568fc4b8a27716eef97354ac SHA-256: fafb84509f48df0959350eada7c2507b3cc7e743888842fa6f445ddd3578dc80
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a user manual for a Farberware air fryer. This redirector likely leads to a malicious site or payload. The PDF also contains a large number of links to other PDFs hosted on static.usrfiles.com and cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for the malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=user+manual+for+farberware+air+fryer
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://static.usrfiles.com/ugd/b8c837_80ece1300f8c4745850d497730144fcf.pdf
    • https://static.usrfiles.com/ugd/822ecd_650ee187ce7648da9897b90a716c521c.pdf
    • https://static.usrfiles.com/ugd/97aff7_87eac6b8e0574eeb97885a81827edb4f.pdf
    • https://static.usrfiles.com/ugd/735189_745f639609e54539867ac1ea5f22c3e0.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/vemenazenepoluvidurixuvom.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/vulupazi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/85099297235.pdf
    • https://cdn.shopify.com/s/files/1/0467/9856/9623/files/divinity_original_sin_2_huntsman_vendor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1989/3927/files/truth_table_in_logic.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/real_time_applications_of_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/92736871683.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/61045813552.pdf
    • https://cdn.shopify.com/s/files/1/0465/3459/0614/files/79062803893.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/52303811113.pdf
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/52223327777.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/photoshop_2019_crack.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/gadejofaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/texto_narrativo_descriptivo_argumentativo_y_expositivo_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/83334819014.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a00.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 2828 bytes
font_01_sfnt_off0000a3fb.bin
8a1f8fa410f9584cc395ae01f0b6f045748dce0ba98f72eb7e7d67ac8153e8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FB 5040 bytes
font_02_sfnt_off0000b514.bin
4470d5657fd0dc1c692ffbdc8612a27fffac6479c2eb50d25a3e0998fd8d1b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB514 11408 bytes
font_03_sfnt_off0000d9e6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 4324 bytes

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