Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e047fde5f8d497d…

MALICIOUS

PDF

57.4 KB Created: 2020-07-29 16:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d729e775e0365dd9272aa94e15ac691 SHA-1: 3093a28558345649bf33803658c58d73ba56a708 SHA-256: 8e047fde5f8d497dfe587824fd933883114f78e15be6a7f1e32f5ea01a122608
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with numerous external links, including one to 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to lure users to malicious sites.

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=concave+and+convex+mirror+pdf
    • http://files.bruinsyouthcheer.org/uploads/1/3/1/3/131379944/2cae5b.pdf
    • http://files.jpacperformingarts.com/uploads/1/3/2/7/132740285/mozisatexujofegitoxu.pdf
    • http://files.joshuaroseshepherdhuts.co.uk/uploads/1/3/1/6/131637257/lorizewilivurej.pdf
    • http://files.readywritercsb.com/uploads/1/3/0/8/130874526/3019184.pdf
    • http://files.readywritercsb.com/uploads/1/3/0/8/130874
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/gajavugoledevalawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mazimuzoxoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/xokisodivofibitubede.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/xefuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/noposugopowomeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/22503842452.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/75308877177.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/sezenurusopixaxofiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/58787337276.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/5908743455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.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_off00008663.bin
7e590fbd229713ec06224b8d42e3946da0651e5dbf11642ed5be2611e4decfda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 4952 bytes
font_01_sfnt_off00009721.bin
519984f3d79ae8e37a0e3d7f12e896ec232220b0251dbb6fd2c871c837d36173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9721 13984 bytes
font_02_sfnt_off0000c372.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC372 16036 bytes

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