Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ce8e120eeb2b67…

MALICIOUS

PDF

39.6 KB Created: 2020-08-25 05:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41dfa15a55888d5a3b9736b3dc29843 SHA-1: 65aaebccbec78ec2b5b772204b7fb4d56a820743 SHA-256: 41ce8e120eeb2b6759f23e80cb73f87a3210c51e231fa2e3495763061d776b2f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL, 'https://ttraff.ru/pify?keyword=carfax+report+vin+lookup', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to Carfax and the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

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=carfax+report+vin+lookup
    • http://puvugogo.vertex-tooling.com/uploads/1/3/1/3/131378991/bizokamofeguxavomen.pdf
    • http://files.cainedelup.com/uploads/1/3/2/6/132680915/fuloxigadad.pdf
    • http://files.sandiego-ymf.org/uploads/1/3/2/8/132814241/dogigiguba.pdf
    • http://files.misplacedolls.com/uploads/1/3/0/7/130739379/xatuzam_fijixifawatosam_wiruro_dalepaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5311/1704/files/fakovofibiwumexuditugep.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/etfs_physical_gold_factsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/97916508211.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/braham_kavach_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/etiologia_del_cancer_de_estomago.pdf
    • https://cdn.shopify.com/s/files/1/0461/9413/1093/files/50920566115.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/90615696895.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/char_griller_pellet_grill_9020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/42635101780.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/gurley_injury_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/allahabad_high_court_aro_2020_paper.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_off00005ed3.bin
f4d116574605546f29f0441d0881fa0ef84a2bdd6528231f2155108802424d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 4812 bytes
font_01_sfnt_off00006f4e.bin
e3a95d0fa3b6954a0320cb01d65b29fd284df2697af93832cf6310b558800d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4E 10160 bytes

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