Malicious PDF — malware analysis report

Static analysis result for SHA-256 76497f99138ef3b0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 22:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061b5bcf5cd376b7a871afb0afdfaa04 SHA-1: 289a6397d46c6c2fc32b0fdeab3c4688e0fa4324 SHA-256: 76497f99138ef3b0a7e6a05c4ed6e14aa15cab1580b7bdc401571435abb2e06d
194 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 intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and appears to be a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=agradecimiento+en+ingles+formal
    • http://files.fmvsa.com/uploads/1/3/2/7/132712358/wojaluvinov.pdf
    • http://files.melysionmeigancakes.com/uploads/1/3/1/6/131636834/xekivuf-karinabevi-jugedatodit.pdf
    • http://files.charlielavaroni.com/uploads/1/3/2/8/132814967/dawofizufirerib.pdf
    • http://files.xinchengqiu.com/uploads/1/3/0/8/130814346/2394281.pdf
    • http://files.cadavercarnivalstudios.com/uploads/1/3/0/9/130969003/vimezurijar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/history_of_axum_obelisk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/56773476049.pdf
    • https://cdn.shopify.com/s/files/1/0434/3280/4504/files/71109545296.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/zigukexoruxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/wulogogogabiwumaxanigafi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/lasefizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kenetawibonilolususede.pdf
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/34554050419.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/winobodisafulejiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4334/6839/files/xenefewawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/vunivawidivuzajukak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/58031667080.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_off000060ba.bin
287f714eb6385a403d53ac85624a4fe2143f4dbf46e8daac57d8eb7e8788e0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 5328 bytes
font_01_sfnt_off000072bf.bin
a335bb9d018d3b15b2b4c313f8111e7d3794c5962685ec4aee134fea567fcae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 10632 bytes

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