Malicious PDF — malware analysis report

Static analysis result for SHA-256 032a47fda7c2f93b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 01:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd5c164e1651e69beccc733f2da50f22 SHA-1: 427b6bd06bc886372829a4472b65aefc1e175d0c SHA-256: 032a47fda7c2f93b8e2da61731dc80a56debc9a298eb11adf04a5cab5a2856ea
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to labor risks, and the file itself is flagged by ML classifiers as malicious. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=que+es+el+riesgo+laboral+pdf
    • http://files.plannprogress.com/uploads/1/3/0/7/130775378/javolagaxo_korejifa.pdf
    • http://files.myhealthaccel.com/uploads/1/3/1/3/131384173/wukasakedepe.pdf
    • http://files.beithashaar.com/uploads/1/3/1/3/131380547/9141882.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/67345175490.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/79706900311.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/1745843822.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/begajugopebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/tofivemojef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/pc_jain_paleontology.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/11909343132.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/41289693502.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/sokorogevepuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/56070340375.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/jakilojapaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/sakebefuwuxevugir.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/volagozunetuwijekafubasal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/2530953047.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_off00006369.bin
6343d06ee7fde4a28a0eb5336dd4b7c6ae0405a9e291332068aea1138a0c1065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5408 bytes
font_01_sfnt_off000075ce.bin
aba9a93a7fdddcca52ccb18effddd22779b0b407ee9c16df637f099b0b9ce961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 10884 bytes

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