Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a98763a13ce560…

MALICIOUS

PDF

39.1 KB Created: 2020-08-10 22:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976cced2b12677f0d529d2d849125259 SHA-1: c25892eb2a63a2a9adbac2abdb560e2ba092b70d SHA-256: 39a98763a13ce560729a408dba7118814016523a81913f417a6799b9ee4e8bc0
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm or SEO manipulation scheme. The primary malicious URL identified is 'https://ttraff.com/wb?keyword=simulation%20argument%20pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to distribute content or traffic through a seemingly legitimate platform while masking malicious intent.

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/wb?keyword=simulation%20argument%20pdf
    • http://files.destinationhop.com/uploads/1/3/0/9/130969334/vufot.pdf
    • http://files.samanthajade.co.uk/uploads/1/3/0/8/130873820/noxabalutuli.pdf
    • http://files.godsetmeup.com/uploads/1/3/0/7/130776828/rewunitozuwusilusoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/46621515392.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/herblore_calc_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/human_body_systems_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/5071/0693/files/nidazavotebukonowe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/31102375780.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/data_store_roblox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/84240254289.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/marupijekizavugipid.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/neoclassical_literature_authors.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/508957232.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/vejobumogunatobikibusat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/29884728324.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_off00005d58.bin
d5eca23e9f11b8ee0b818b5692f2ee3866febc7ff634d90da4f5a74e50fea7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5288 bytes
font_01_sfnt_off00006f33.bin
30c3ba540e32ffdf314fad076eeb01af80d8abc7b8f1454b5485875302cace3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 9556 bytes

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