Malicious PDF — malware analysis report

Static analysis result for SHA-256 053ed02d9aec3280…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 12:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92df0f29ca7e2ca53a24dc8594acd966 SHA-1: d789df5cd6328df97fa33259087c06ee37a8d47b SHA-256: 053ed02d9aec3280b949c43ad2b5c6c3338362301697fcf3488d44e91d042499
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The embedded URLs and the heuristic firings strongly indicate a phishing or redirection attempt.

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/wb?keyword=manual%20handling%20operations%20regulations%201992%20summary%20health%20and%20social%20care
    • http://files.hydronicspecialtysupply.com/uploads/1/3/1/4/131437813/kugitexaduximam.pdf
    • http://files.bonnieyoungdesigns.com/uploads/1/3/1/4/131409385/9423198.pdf
    • http://files.mandalatreasures.net/uploads/1/3/1/3/131384636/3531508.pdf
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://files.onelooksalon.com/uploads/1/3/0/8/130874620/bitizupufegop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/78390077526.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/45276235558.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/90378495419.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/figaget.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/43453999847.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/jufasutorineserotagow.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/72188372889.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/95927199480.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/lixasevegufotenogije.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/sales_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/butujevubokidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/23607605502.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_off00006476.bin
85480884e75f60dceb5740789cb5d5de253896086699f7a63783459470be9aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 5936 bytes
font_01_sfnt_off00007897.bin
72e26bf3a950cf7f0d66671d3543b4834348f684d828899d67878f0eb0163762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 10000 bytes

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