Malicious PDF — malware analysis report

Static analysis result for SHA-256 763cffec308ebdb7…

MALICIOUS

PDF

42.8 KB Created: 2020-07-29 02:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2b68dbf03c14f88b23baad90c0404b SHA-1: d4ed1da2017ad86ecb6c98bc13a228b8558bfd91 SHA-256: 763cffec308ebdb78e38f636a2defe57ffe59729de812ec4c1b3c480b7b66cff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to technical topics to entice clicks. The presence of a malicious redirector and a large number of external links strongly suggests an attempt to drive traffic to malicious infrastructure.

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/wb?keyword=microservice%20patterns%20and%20best%20practices%20explore%20patterns%20like%20cqrs%20pdf
    • http://files.catheymccrary.com/uploads/1/3/1/8/131871480/472de31.pdf
    • http://files.saveekuriforest.com/uploads/1/3/1/4/131484133/gusuzifigalora-wamasizaf-zexogavivaz-pebal.pdf
    • http://files.ohiopedologist.org/uploads/1/3/0/8/130813582/9879981.pdf
    • http://files.sparkleaycliffe.com/uploads/1/3/2/8/132815154/48f525d2551f243.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/nafizikopirimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/nonusub.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/20151374530.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/88415483514.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/90355363645.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/68579740687.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/97004839967.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/wurafumolumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/didoxivuwelabefeberaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/domuderodinigot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/11588559924.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/vukinuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/43275481361.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_off000068f7.bin
7efbea1c57c4060b68139af6e5d55a69542db1cf2f0b7ef693b0d73bd05a0906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 5400 bytes
font_01_sfnt_off00007b5e.bin
ae1b9dca651d79b458047dfc73b2e3dae76a63551938acd397ac8b3144d43ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 10324 bytes

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