Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c2608d9ab87949…

MALICIOUS

PDF

38.2 KB Created: 2020-08-12 00:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a36de6094b7f05185f249dbff4a972 SHA-1: 4cfba7c87798d526f6473ead58015db02c22c750 SHA-256: a8c2608d9ab879493f32048e5549df5a12a8184cadf48f1a9fdbb699fcf363a9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. The primary heuristic indicates that one of these links, https://ttraff.ru/wb?keyword=factorization%20practice%20pdf, is a known malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure through a deceptive SEO-like scheme.

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/wb?keyword=factorization%20practice%20pdf
    • http://tosinazep.indigosoulstudios.com/uploads/1/3/1/4/131483337/cfb4cc57de.pdf
    • http://files.smokeyfiresidecreations.com/uploads/1/3/1/4/131411199/negitozulifi-rinorakokoniji-sibetogewuz.pdf
    • http://files.nonatomusic.com/uploads/1/3/1/3/131384424/78c66654864.pdf
    • http://files.newlifedirectionsministries.com/uploads/1/3/2/6/132683463/cb5cf6a4ee7d.pdf
    • http://files.edgingtonroaddistrict.org/uploads/1/3/0/9/130969580/9418611.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/jijoridabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/autonomous_underwater_vehicles_modeling_control_design_and_simulation.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/pebofiwawebix.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/cumulative_sum_control_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/xotozikoxeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/galotutobidutoteketodegek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/dijazoferun.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/zexuxufiwewef.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/rage_card_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/61235218568.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_off000051e8.bin
d042404c0b1c410ace1ce8f094cd40dd0cb62062fef2c010b0607e814aafe523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E8 4944 bytes
font_01_sfnt_off000062cb.bin
12c25658efb959ceae423ae99c754b6058f1ddb10e18312fada117d1e81c8b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 13072 bytes

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