Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2337e16580207ac…

MALICIOUS

PDF

33.5 KB Created: 2020-08-20 23:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40ef375c7597787d59e2234f6bd85cc SHA-1: 60fc20d2b2fc2b32966174f2026b216b366322eb SHA-256: c2337e16580207ac31e26d43d3f16902937c3b8c5e6acb64895bbb547d3bfd3c
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded URLs. One URL, 'https://ttraff.com/pify?keyword=beach+background+images+hd+free', is identified as a known malicious redirector. The presence of a large number of external links suggests a link farm or redirection strategy to obscure the final malicious destination.

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.com/pify?keyword=beach+background+images+hd+free
    • http://files.dogcatproducts.com/uploads/1/3/0/7/130776049/8157943.pdf
    • http://jeges.jenpellingra.com/uploads/1/3/1/6/131636881/dukamamazozimiwozovu.pdf
    • http://vagoju.alliesonthejourney.com/uploads/1/3/1/4/131407406/2ed34f397b.pdf
    • http://files.theaterinthewoodsvt.com/uploads/1/3/1/4/131483110/kakutu-labuvekovolapul-mifalodibinogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/list_of_bombastic_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/wosoxibetojozudanejese.pdf
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/nirowazuvuleje.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/bond_energy_calculation_chemguide.pdf
    • https://cdn.shopify.com/s/files/1/0466/7808/1701/files/kosumefalopiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.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_off0000472e.bin
58d28d715db945a74ed6d9998fc16746b5f25262e5c71a9f4866eaeb62a69893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x472E 5656 bytes
font_01_sfnt_off00005a37.bin
b49819e85218ee9bd76c58e8a500d96660cda477fb47a6875fd144f8fd2fcba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A37 9112 bytes

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