Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bc3e2985842be0…

MALICIOUS

PDF

48.8 KB Created: 2020-08-29 02:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 937914386ea7c417539c1b52a265227b SHA-1: d511d5fa1b8f2bbd32e7d6f7a64a459e1777ea93 SHA-256: 12bc3e2985842be09e776d740b069f5641698cc65ec7805faaa8c580f2971937
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=a+child+called+it+movie+online'. The document body, though heavily obfuscated, contains similar text, suggesting a lure to a malicious site. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.cc/wix?keyword=a+child+called+it+movie+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/pokeriti.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/76556913819.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/quality_assurance_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/learn_english_speaking_fluently.pdf
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/jexuxogofirekav.pdf
    • https://static.usrfiles.com/ugd/b8c837_587835a246bb40b29448abf5d98af683.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5770c939a3345329611b70808e26100.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd5c1e5383ec4a6cb593011b71e4da39.pdf
    • https://static.usrfiles.com/ugd/b8c837_763f67862ff24528ba912f4eb9f8db6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca84c32b404848afb21662144e46e05e.pdf
    • https://static.usrfiles.com/ugd/b8c837_84eaaea3660d4c8ab7f4fd1c2f4ce3aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa054a5fcd264abc984fea4c92328c5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b02eeaa05704768a4dc0be4137c9f2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d413f66ba2754318983edc8952c2a461.pdf
    • https://static.usrfiles.com/ugd/b8c837_95974da338b44178b93cc0bcdc4fb312.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_off000081fb.bin
21ac3ff35b716d4cc55a51e468a906a843b4cdb23050536e923d2d4187e2ed51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FB 4952 bytes
font_01_sfnt_off000092b3.bin
d794f337c2dba3f59763b30a19b968706dc4392bd9396cda671c998ebd627809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 10488 bytes

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