Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cabb005bac0571…

MALICIOUS

PDF

46.9 KB Created: 2020-07-25 04:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f077ba7942977f4034fc6560bd75c61c SHA-1: 445d3b8b126e08eca21fb6afe3b5f1f4954fd374 SHA-256: 69cabb005bac05718698a7d368833cead854ac19ec2e7d9495345ed17f0fe25a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and heuristics suggest a tactic of creating a link farm, potentially for SEO poisoning or to direct 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=adjust+torch+brightness+android
    • http://files.louisemoss.com/uploads/1/3/1/3/131382470/ab50128145ea.pdf
    • http://files.southsidetees88.com/uploads/1/3/2/6/132680986/sudarojeze-vulisiwex-sumazumotorame-vigateto.pdf
    • http://files.mcclainmatthewsinsurance.com/uploads/1/3/1/4/131409090/7232005.pdf
    • http://files.sbcopywriting.com/uploads/1/3/2/7/132740218/644292.pdf
    • http://files.lindsaybakercoaching.com/uploads/1/3/0/7/130776745/1351b5fe3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/dogibutufeguxabupobari.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/8571872940.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/wogokofenilidajop.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/tejimotuzuxiwijupigenelej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/rejugovub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/putanerivafudalufazaniwim.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/69232376486.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/30323083479.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/tosev.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006403.bin
fad79edd0e0d96a44e07fd76711b5aed6323b755887efd5a46cffe69a89b0ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 3184 bytes
font_01_sfnt_off00006f59.bin
ebebcaab42fc4bb1a670a007a9e26ed5eead7fdd1debb245d03c02cdc5202ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 5256 bytes
font_02_sfnt_off0000812d.bin
6edd2dc65f8cc0d4bfc465674af3a6957927c9580e196fa1f2ecab0bfce717d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 2024 bytes
font_03_sfnt_off00008ac4.bin
8c399c6bf84715d96aa0afd3cfb17f81f46a071f9cd052f1a63f080248fa6581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC4 10264 bytes

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