Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a72d1096a1d9ec2…

MALICIOUS

PDF

39.5 KB Created: 2020-08-18 14:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eedab8476a548dadf7998d166527a84 SHA-1: 3c6eb896fdc10e21a4fd12016b8e7099830582e4 SHA-256: 0a72d1096a1d9ec2924d7452c5c4f738f77ca059c2e3ee34eaf4ec9b08de1cfa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs and document body text that attempts to impersonate an 'injury report' to lure the user. The primary malicious URL, 'https://ttraff.cc/pify?keyword=culberson+injury+report', is flagged as a malicious redirector. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic, with the intent to distribute further malicious content or phish for information.

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=culberson+injury+report
    • http://files.sculpturebylebowitz.com/uploads/1/3/1/3/131383510/ziburajum_lalatofegamunak_kazupubuli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/vofedikusozotejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/71843494558.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/1573259714.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/bluecoat_proxy_logs_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/12071462457.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/87186184851.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/84435511077.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2443/files/70538643269.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e38.bin
7b1d72d7208673921dbf0d17edab684045336a68c20250b458217d04153e6a9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 4828 bytes
font_01_sfnt_off00006eb0.bin
ea7d1acbb39501b021878a1cdd8605db169de71e23402798215fa46aadd7d773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB0 10332 bytes

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