Malicious PDF — malware analysis report

Static analysis result for SHA-256 5926c8e67abd9735…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 21:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a4af27416a2f34533b292766dd7e5b3 SHA-1: 2833ac3d8895146485def6dac517657e85c938b1 SHA-256: 5926c8e67abd97358bc45a88dea152afc7e1859691d40bb37028993e34fb7f77
120 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 identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Hodkinson abbreviated mental test score pdf' and the malicious URL, suggesting a lure. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content or redirect users.

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=hodkinson+abbreviated+mental+test+score+pdf
    • http://files.skinsonegin.com/uploads/1/3/0/7/130739404/b17ceb8b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/motaxirujasugusenufujuwew.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/fatobepebidenovemalarisan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/53249467156.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/23298363455.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/bidepagurinevodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/pasitutububoruv.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_off00006c76.bin
a3b34f9b30fac441af6d9dd515c77f4d048fbabab87cf1d4d603c566f6a163f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C76 5528 bytes
font_01_sfnt_off00007f2b.bin
8c5847b78d8fcb02198c5c7ae7b708e5432ba78b13d049c44727bc045b9bd07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2B 15600 bytes

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