Malicious PDF — malware analysis report

Static analysis result for SHA-256 9646eb1e04768294…

MALICIOUS

PDF

47.6 KB Created: 2020-08-23 01:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc2cdafcc51966eebac3fe586910d9fc SHA-1: e629b77907000298422478593bd658a5a5021c77 SHA-256: 9646eb1e047682940eb25b7bdcb8cc7d384e3dca64ee9264e5d8a41a3e413817
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Europass cv greek template' and the malicious URL, suggesting a lure. The primary malicious URL is https://ttraff.cc/pify?keyword=europass+cv+greek+template, which redirects to other sites. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=europass+cv+greek+template
    • http://zuxut.cleaningbolton.com/uploads/1/3/2/6/132681670/genumogovi.pdf
    • http://files.alamovalleyconstruction.com/uploads/1/3/1/4/131408027/4630725.pdf
    • http://files.delavalredstandardpoodles.net/uploads/1/3/1/3/131378899/15df42aba5ccee9.pdf
    • http://files.whistlerhalfmarathon.com/uploads/1/3/1/3/131380107/45ab02bacd.pdf
    • http://files.partydoodle.net/uploads/1/3/2/8/132814138/gemikunefimeg-zobima.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/numef.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/electrical_engineering_mcq_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/buffalo_bisons_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/96418170091.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/43019774577.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/30178452833.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/69671342828.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/25041301861.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/6540572539.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/aluminium_6082_properties.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/29960295020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/calendario_settembre_2020.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_off00006f2a.bin
eb293ddf83b5fc9ca595cf723dbcda0cc5f18e798330e4930d79a7aa01bec208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 5336 bytes
font_01_sfnt_off00008147.bin
4c0d89e3d0037667bde6157384531fa5d92e1d5afffc9a5235cdf171df05ff3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8147 14604 bytes

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