Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94717be6fdf24c7…

MALICIOUS

PDF

36.7 KB Created: 2020-08-04 01:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2129de311209d53c4b22928cacdf557 SHA-1: 95e72d439c277a0bfb36622d05f6169410865a55 SHA-256: b94717be6fdf24c78598a69f62c69bb524b6f0775d78d0ef6815f5ed7c2b3720
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Skf bearing unit catalog pdf' and the malicious URL, suggesting a lure to trick users into downloading further malicious content. The presence of numerous Shopify-hosted PDF links indicates a link farm SEO tactic to improve search engine ranking for the malicious content.

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.com/pify?keyword=skf+bearing+unit+catalog+pdf
    • http://files.jandjfinancialsolutions.com/uploads/1/3/1/1/131164054/2671346.pdf
    • http://files.connectorofpeople.com/uploads/1/3/1/3/131382030/kikudopepisimut.pdf
    • http://files.davidfunkpainting.com/uploads/1/3/0/9/130969655/kizevevuwu_bopedebovufeso_moporobinibe_bukakaxobugage.pdf
    • http://files.botanicaibukoleshop.com/uploads/1/3/1/4/131437792/209958.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/vijipojaredetobimej.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/tonajuralosapidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/63961881282.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/55440033399.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/64864893636.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/tevobiwakemisonewokere.pdf
    • https://cdn.shopify.com/s/files/1/0437/1300/3674/files/asus_zenpad_z8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6808/files/40593294767.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/pazazebivatulawe.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_off00004592.bin
d2455a628ad0aa2a963c46c1d9418678a64a204b892304a5e5ff7158e5659886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4592 5332 bytes
font_01_sfnt_off000057b6.bin
9289dd13e9df01de4c6ecb0a9519f0dcdf5bf5c4a799dc363abb4aebb53711e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B6 9472 bytes
font_02_sfnt_off0000782b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 4324 bytes

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