Malicious PDF — malware analysis report

Static analysis result for SHA-256 0515eda4e41f8e2c…

MALICIOUS

PDF

35.1 KB Created: 2020-09-16 14:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87f554ae93786b6cdea5f6e264cd93a0 SHA-1: 80a0d05aaa2272ebd519aad044d4ab72396f5409 SHA-256: 0515eda4e41f8e2c48f249781ef1aaae7a99350bc5da7e973816074949858009
154 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it links to known malicious redirector infrastructure, specifically a URL related to 'luigi's pizza menu'. The document body, though heavily obfuscated, contains similar text and the malicious URL. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document and a malicious link.

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.link/pify?keyword=luigi%2527s+pizza+menu+graham+nc
    • http://files.iucnbsg.org/uploads/1/3/1/6/131607712/71fb9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9413/7249/files/game_android_mod_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/83047344205.pdf
    • https://cdn.shopify.com/s/files/1/0436/3082/1529/files/99780159870.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/fra_forward_rate_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/vadepuzizixebesazosok.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/northwest_territory_tents_8_person.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/assistant_site_manager_resume.pdf
    • https://cdn.shopify.com/s/files/1/0459/9719/5421/files/84209237486.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/63277135265.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/54838345965.pdf
    • https://9e44ad94-acb5-44e0-a883-209b921b4900.filesusr.com/ugd/70e7d4_40928ab6739044a684111f50972c99be.pdf?index=true
    • https://76ce13fa-6817-4dd7-a765-0d69d0ea408c.filesusr.com/ugd/2dbf5a_ba7cc5c4474841caa555e54bd446ac36.pdf?index=true
    • https://13fcb855-10df-4961-9a59-98d300588de4.filesusr.com/ugd/54dfea_f1c93ebb21b74d4b8cf6b23bd1390bf3.pdf?index=true
    • https://a94f5f6c-62be-48e9-b8f5-3e552a1b4a28.filesusr.com/ugd/3a38e0_b0a954e8abdd484ab72b4b332a278bbf.pdf?index=true
    • 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_off00004a91.bin
f6ae2778c93eb69d2a7a0b96f61aec83ea627ccc5594ff601f12669f625a023c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A91 5340 bytes
font_01_sfnt_off00005cab.bin
6dea21e58267dc1de7372038d23b72dd68f441a40211e9bc1aed671d37e9e176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAB 10216 bytes

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