Malicious PDF — malware analysis report

Static analysis result for SHA-256 f051409d6eea73c7…

MALICIOUS

PDF

46.9 KB Created: 2020-08-22 03:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 154f811f1ca20411cc080459afac3cbf SHA-1: 4d64139adffd6dde9890c3454648ff8947b2e459 SHA-256: f051409d6eea73c7589fedf6009398306c429a3e9568c0ebad07ac06d54fa4eb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=bulleya+lyrics+video'. Additionally, a large number of external PDF links were found, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to classify this as a malicious document likely used for phishing or malware delivery.

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.ru/pify?keyword=bulleya+lyrics+video
    • http://files.meruka.net/uploads/1/3/0/7/130776393/c0c94666e.pdf
    • http://tubukovef.akpsipsu.com/uploads/1/3/1/4/131452903/fufirinotom.pdf
    • http://files.integrativecoachtraining.com/uploads/1/3/2/7/132741556/gomixu.pdf
    • http://fakodo.msiphotography.net/uploads/1/3/0/8/130813714/xodigadulewoson-gujuvudetip-popotogexanakut-vigapezek.pdf
    • http://files.ohtheplacestogo.com/uploads/1/3/1/3/131383613/leselimam_sowuwu_ginexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/42698414376.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/40272407846.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/rig_veda_upakarma_procedure_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/xapevaparijasozojidotox.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/math_problems_for_first_grade_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/bifuzibebiwimed.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/demensia_alzheimer_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/ranuxarisonazaruvale.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/78921297022.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4790/files/66721418815.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/sidiramosomebinexopub.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/39307712278.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cb.bin
962dc7ee8e0d8c6146513fb0c6f684e9a6360513fc06bd03acd9aa174c52e5b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5144 bytes
font_01_sfnt_off0000765e.bin
8888bc535b6a8d0a427796178b91769f29aa7a14540105dc9540c0a5aefadd2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 10228 bytes
font_02_sfnt_off0000995e.bin
e3cac9d88106a4399ab92de40a04c1190d90db147839534caf9208c75de91564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x995E 16260 bytes

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