Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c29bd2355eb6a0…

MALICIOUS

PDF

46.9 KB Created: 2020-08-29 17:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7b9a8f169c75366ac8892b24fc09d2 SHA-1: deb751a969b53f7e36b7c46ed00d04d810f109d1 SHA-256: 03c29bd2355eb6a0ccf76c2e972009941ea6c35fda343153ca08b15430985808
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.me, which is likely used to distribute further malware. The document body, though obfuscated, contains text related to a decree and the authoring application, suggesting a lure to disguise the malicious link. The presence of numerous external PDF links further indicates a link farm used for SEO poisoning or distributing malicious content.

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.me/wix?keyword=decreto+806+de+1998
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8724/1119/files/66573158194.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/21921292312.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/wiximevinok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7440/files/5423041293.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/17820657108.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/mufunus.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/arctic_silver_ceramique_2_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/ramiraliwidoturelevaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_84a0b93aa568496e8e1fa3454ffecf22.pdf
    • https://static.usrfiles.com/ugd/b8c837_08eeb43d05254791a498f9333ada8f1e.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_off0000679a.bin
f0f887c714cc820394cc00f8cb92fd41a2670869ce30f2c2a441543092ade449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5212 bytes
font_01_sfnt_off00007960.bin
a9080300ccd81ca85ff404634a7304283d4fd11bc3b286f7d18c30277ea6c6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7960 17824 bytes

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