Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d45daff3c3bee82…

MALICIOUS

PDF

37.1 KB Created: 2020-08-14 23:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 948ce301703103579cb6b2ac29508ba9 SHA-1: 98ad62584f09c864605b83f8450d6e03ff9fdba9 SHA-256: 1d45daff3c3bee823e8969e2a1e04e81281b634288e54058425044d1a9c32db4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=orcad%20pcb%20design%20book%20pdf', is designed to appear as a search result for a technical document but redirects to malicious infrastructure. The document also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm for SEO poisoning or to obscure the final malicious destination. No scripts were extracted, but the primary attack vector appears to be social engineering via a 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.cc/wb?keyword=orcad%20pcb%20design%20book%20pdf
    • http://files.brookwoodpottery.com/uploads/1/3/1/4/131453276/75b681.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/atal_pension_yojana_form_axis_bank_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/82200173352.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/tasogazivosijud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/suwijesugupazesobemadaneb.pdf
    • https://cdn.shopify.com/s/files/1/0448/5762/2689/files/weighted_average_cost_of_capital_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1567/files/38211014150.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/wematebafadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4828/files/ledujibiwaronunobev.pdf
    • https://cdn.shopify.com/s/files/1/0447/6780/5591/files/wapasesowolapezegedalod.pdf
    • https://cdn.shopify.com/s/files/1/0437/6543/2477/files/acuerdo_comercial_mexico_japon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/guvuvikajukilavutumotunep.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_off000054d5.bin
5edfe86b9564ff83fcecc1e6509410da7cc37011c8ab3125908f099e0b31cd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D5 5524 bytes
font_01_sfnt_off000067a7.bin
f0a410289d31bfb158382ca7027d0a3ff0ca3c311a7afff99ceb76df617d5160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 9496 bytes

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