Malicious PDF — malware analysis report

Static analysis result for SHA-256 6943a48c1589e0de…

MALICIOUS

PDF

44.4 KB Created: 2020-07-29 03:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd916a0852d92cfc5bf17e2f4941a80a SHA-1: 326732a6be4819c447ff660d8bb8d6caefb675e5 SHA-256: 6943a48c1589e0de615b7c50d5675738884e218238587b0d57f0b2b028888bbc
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains keywords related to graphic design, suggesting a lure. The presence of many external PDF links indicates a link farm strategy, likely to improve SEO for malicious content or to distribute further payloads.

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.com/pify?keyword=arabic+fonts+photoshop
    • http://files.tristatemaxedoutwomenspac.org/uploads/1/3/1/4/131437711/3564189.pdf
    • http://files.keyconceptslearning.com/uploads/1/3/2/8/132814415/kabupilax-zivegixipanonix-sulolonik-nexuzukipefuweb.pdf
    • http://files.chrisspaight.com/uploads/1/3/1/0/131070393/bexasotonorobagarug.pdf
    • http://files.thejungleygk.com/uploads/1/3/0/7/130739366/6202390.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/bigoxum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/simomivesomotuvuvamojun.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3452/files/29268837353.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/60596333150.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3155/files/71280810443.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/pujukilivuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/40887006609.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/88475817320.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/mifuwizigazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/bijemofegekazesijusilo.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_off0000731b.bin
574451846c5c2cddccf4d6f2633dd7746cf3b177d38cfa79b336243e1c4e75f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x731B 4868 bytes
font_01_sfnt_off00008386.bin
5b4d2f78ad5562fc6cd6daba4e6b93c07ac6a6c1084a91bd68295575996f57fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 9604 bytes