Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58180c435dd702d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-18 23:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298fb78de765f8b154624a0cc6b486da SHA-1: 12cdd0b8f16703886ebc398dd1efa321f9a38ef8 SHA-256: b58180c435dd702df571ac3eb1bb9a13a5b3f55792600145a5eb4d0c54e7082b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.ru/pify?keyword=recipe+for+chocolate+sheet+cake+using+buttermilk', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL, suggesting it is the primary lure. The presence of numerous links and the malicious redirector indicate a phishing or redirection attack designed to lead users to harmful content.

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=recipe+for+chocolate+sheet+cake+using+buttermilk
    • http://files.lawrencedavidlegal.com/uploads/1/3/1/3/131380126/lapij-daver-buxadu.pdf
    • http://files.zenmeditationgarden.com/uploads/1/3/1/3/131382673/9863916.pdf
    • http://files.wolcottcasa.org/uploads/1/3/1/3/131384573/sowevasiwijoxufivilu.pdf
    • http://files.axaofalps.com/uploads/1/3/0/8/130813906/tosofesebiw.pdf
    • http://fujive.skincrediblellc.com/uploads/1/3/1/6/131637284/8321112.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/51588144919.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/android_7._0_easter_egg_cat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/29946276879.pdf
    • https://cdn.shopify.com/s/files/1/0447/8982/5687/files/vomujidafemidar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/fuburidujerubexuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/bleacher_report_football_rankings_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/rerotuzalaxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/pusidonezu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0398/4547/files/honda_civic_2014_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/goxinerifonudanarajepunap.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_off00006a7f.bin
a7ba960cd4c662a1070149f655f4bb405c516e78e3c36244451cd6f1921507aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5640 bytes
font_01_sfnt_off00007d79.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 1800 bytes
font_02_sfnt_off00008607.bin
a746d2b793e5ecea90515c3134d4370c107aedccf0ad9f84bedb6d06a6f83e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 10096 bytes

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