Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91a9c811d3f3d4a…

MALICIOUS

PDF

57.4 KB Created: 2020-08-20 20:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7489d48d1912bde251aedd27a97c49d1 SHA-1: b86f9e4f513ebddcb976ac0df1aa4f6be661b858 SHA-256: b91a9c811d3f3d4a5a6c9a646a6996db2bb8a908fadfcc14931133707d5b4834
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a sports news link. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The primary attack vector appears to be social engineering, tricking users into clicking the malicious link.

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.ru/pify?keyword=bleacher+report+nfl+football+picks+week+10
    • http://malok.travelwithsouthwind.com/uploads/1/3/0/7/130739046/xoximuke.pdf
    • http://jatizu.josefjakobs.com/uploads/1/3/2/7/132740978/xukuvobirizoj_supitojepubu_nuliwozin_bisegodezevosiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/mojirodajupemufosejeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/vebekazu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/xofikodokopuruzafa.pdf
    • https://cdn.shopify.com/s/files/1/0451/2425/5898/files/heme_synthesis_and_degradation.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/fefazubazilenized.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/12152356613.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/ff_viii_seed_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/87481407741.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/97780614144.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/rirezoxikinebatemufef.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_off0000a184.bin
167140a45d93484cf140cc8966ad2830c755ca3b03951f0dd1a11781059a8060		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA184 5640 bytes
font_01_sfnt_off0000b4be.bin
a9a5918759730e5d468fa4a322f5daddb93b480c6209bd15ed5e6548051cc251		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BE 10392 bytes

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