Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f2e9b4304e85cb…

MALICIOUS

PDF

83.2 KB Created: 2020-07-28 07:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36e2ac44fa68ee04eee04f030741a865 SHA-1: e35bb9e53d26732e1e3fa30240c0572cfc45823c SHA-256: d6f2e9b4304e85cb1ed304665042cab1783f65473632ab87c77295f7cea59167
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to an 'Iowa dnr deer harvest report'. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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=iowa+dnr+deer+harvest+report
    • http://files.kathleenmillar.org/uploads/1/3/1/8/131856518/winozikizuzeziv-fukopik.pdf
    • http://files.youthultimateprogram.org/uploads/1/3/0/9/130969918/befuwegomu_widunekevabebog.pdf
    • http://files.themastectomystore.com.au/uploads/1/3/0/8/130814193/bidesezuzanot-digagurelagin-nowikap.pdf
    • http://files.moonchildmag.net/uploads/1/3/2/6/132695546/a0728f9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/43069320776.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/93602138796.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/94640999101.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/pevejig.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/varugomorus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/bovewusojekibasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/lizijafipumiwejilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/8243770942.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/81845369978.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f568.bin
c41f39271d862e05b75d64c85be0b6ce2282a1397d2d3196feafbd0d7a37e9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 4844 bytes
font_01_sfnt_off000105e2.bin
2c24d62f98f268072cbd814518dd6b7e88f404e38f135f85d74ee6acbe5a962f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 10636 bytes
font_02_sfnt_off00012a20.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 16148 bytes

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