Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea796eaed8224d3…

MALICIOUS

PDF

81.3 KB Created: 2020-07-29 23:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6588d51d30e1f9413e70c8438c7e0b SHA-1: b7184ba4b6b94a1ae2bc3fb6e9d3d343726b93eb SHA-256: eea796eaed8224d368dfe96f75e4b5ba0aeebcd78336d8fa19855dccef152b34
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector (ttraff.cc) which is flagged as malicious. It also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirector link.

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.cc/pify?keyword=paradise+lost+book+4+pdf+download
    • http://files.judithtearlesculpture.co.uk/uploads/1/3/1/4/131437669/zafesuxudibixabef.pdf
    • http://files.shebossunlimited.com/uploads/1/3/0/9/130969982/6493298.pdf
    • http://files.sunnybrookranch.com/uploads/1/3/2/6/132695493/c9a15cddc6745d.pdf
    • http://files.axumagri.org/uploads/1/3/0/9/130969811/695869e4db821a0.pdf
    • http://files.sunnybrookranch.com/uploads/1/3/2/6/13269549
    • https://cdn.shopify.com/s/files/1/0434/9027/9574/files/73147129812.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/tanej.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/95847818746.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/32966460010.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/majijedegavojufuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/jidopiwezoverexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/xirizabazobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/xuwoxomizafeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/50051627954.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/wadizuxolivusodasenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/xorokasikokuzirizoromezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/87827131200.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/25977787261.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/42800779575.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010301.bin
b0babeb48eaa67b7ebc59499155af6bebcaae43b37fd5c1ba84e04a627e3b394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 5208 bytes
font_01_sfnt_off000114d2.bin
8fd23c8c08db0e61c64fda4fcf59f529e1e158489b11bcca597d465b0653ba4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D2 10136 bytes

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