Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad907d566463e0a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 10:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 538420ef6c9bd6d51e8cc0cb471403fc SHA-1: b8d9a2853b98a6c239637a74726f09ac97044ff7 SHA-256: 2ad907d566463e0ab462cd83a2678e230a1e3e9e3da59cd93894ecbd40215c8d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=11th+standard+computer+science+book+pdf'. This URL is presented within the document body, disguised as a search result for an educational PDF. The document also contains a large number of external PDF links, many of which point to shopify.com domains, suggesting a link farm or SEO manipulation tactic to increase visibility of the malicious redirector. No scripts were extracted from this sample.

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/wix?keyword=11th+standard+computer+science+book+pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/simple_inventory_template_access.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/kepimivesunemisonawud.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/aristotle_philosophy_of_self.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/mamijowudifepokomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/mivarimizavuba.pdf
    • https://cdn.shopify.com/s/files/1/0449/2899/1399/files/pathfinder_bestiary_box_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/16076122847.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/compound_adjectives_list_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/ages_problems_with_solutions_for_bank_exams.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/chrome_source_maps.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/67021964232.pdf
    • https://cdn.shopify.com/s/files/1/0432/6984/9248/files/nursing_care_plan_for_bronchitis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.pdf
    • https://cdn.shopify.com/s/files/1/0454/1985/6028/files/beguxakipelidasamoko.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/mabogenie_for_pc.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_off00005f23.bin
29b9644c8542ea24179a06f35a5cf7a2b320e378d46ac987c7684a0276d93172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5524 bytes
font_01_sfnt_off000071b1.bin
f8c9f9c19faab219dfdc60f7db1ceb5a7639727f65aace707db03e8e521fe372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B1 10192 bytes

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