Malicious PDF — malware analysis report

Static analysis result for SHA-256 1983fcdabeda1ab3…

MALICIOUS

PDF

38.5 KB Created: 2020-09-01 04:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c6e2cc88f07a0771d9e817ced106ef6 SHA-1: fce89d3ab199c81a0d8d3818b5285506e79b199c SHA-256: 1983fcdabeda1ab3983b094880e39a324de92853fbca4ec1af5df68aed2b825b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, suggesting an attempt to lead users to malicious content. The document body, though heavily obfuscated, includes keywords related to product ingredients and URLs, indicating a potential phishing or scam lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic, likely used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=garnier+charcoal+sheet+mask+ingredients
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7505/1421/files/984726286.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/fanezimupoxuxetorob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/partnership_deed_format_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca8b8eee8d4640038560f46e57c8d783.pdf
    • https://static.usrfiles.com/ugd/06497e_61372eaf029b44a08886b2c319328e23.pdf
    • https://static.usrfiles.com/ugd/b8c837_81a1a1ea9071436fa46061a6bd567d35.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d05a729c1dd4c169673ba417321a4ac.pdf
    • https://static.usrfiles.com/ugd/0d089b_6fa765ec54c941c2b296adcd6b0eab68.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_76d8b806b82a411b9d4c584d63876903.pdf
    • https://static.usrfiles.com/ugd/6d59ab_9da8f93fcd7148689d281f684cb1b021.pdf
    • https://static.usrfiles.com/ugd/c7a620_46714e234f1d4965a13301e6b741300e.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_c60eefb0650e44aa9c205a765896f83a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000517d.bin
95a3ff4560c095c6db1fc3dc88279b92e634d22cf0117a2d5aa7bf6c39727b5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x517D 5448 bytes
font_01_sfnt_off000063da.bin
c62e8f3211425c82cf99ef2214fd49068f409017cf6706c10a68df70c01b819b
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DA 12544 bytes