Malicious PDF — malware analysis report

Static analysis result for SHA-256 14168e9906b8fd98…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 21:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e052859a20a15c0f99b1fec92d46769c SHA-1: 3ac2b43fd3ad2667ee7b24934c2b4e1a60bf3756 SHA-256: 14168e9906b8fd986561f4e39288e2ab46c3f0a4ee2fd127f5b5c67bb0abae56
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, contains text that appears to be a title related to web development, suggesting a lure. The presence of multiple external PDF links, including one to a potentially malicious redirector, indicates an attempt to lead the user to external content, likely for malicious purposes.

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.ru/pify?keyword=architect+modern+web+applications+with+asp.+net+core+and+azure+pdf
    • http://files.dymonfitness.com/uploads/1/3/1/8/131871692/jobonamawaxapeso.pdf
    • http://files.betterworldmedicine.com/uploads/1/3/0/7/130738769/ragovewineg.pdf
    • http://wagapew.catmintcottagestreetcatrescue.com.au/uploads/1/3/2/3/132303382/4431803.pdf
    • http://files.youngravensliteraryreview.org/uploads/1/3/2/6/132682790/segojoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/libevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/57289626171.pdf
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/pandora_s_box_5s_999_game_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/tagafofopapovenelolixejun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/rexiperisuvoduzajezilokoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/74479440490.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/86153171522.pdf
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/29167695674.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9659/files/jorezituto.pdf
    • https://cdn.shopify.com/s/files/1/0436/9927/3896/files/wuboxisazidemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/vinerojiwajelisuvale.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/vubexupo.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_off000064e1.bin
d34f36d4cc31aa38ab5b75f0da40e0457a6fe0896eeca1f9364360f705ffcc2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 5700 bytes
font_01_sfnt_off0000782e.bin
7fdcd5bd1a11e3ae20350b6c02c2f078440961f1f5cd8a2bc5e8038138142897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782E 9932 bytes

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