Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec9854de3beeada…

MALICIOUS

PDF

44.5 KB Created: 2020-08-02 11:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29ef6b42e5a50b9a6d6b1500e495c9c2 SHA-1: 38a365bc193637f5059ade7877e4644fb41ab2fe SHA-256: 0ec9854de3beeada1896e8a81f07338ab538685a2c9e87a820d6e090d1fd8da3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=intermediate+accounting+17th+edition+pdf'. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful 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.ru/pify?keyword=intermediate+accounting+17th+edition+pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.hollinsworthproductions.com/uploads/1/3/1/4/131407818/zosuwinubulolivoma.pdf
    • http://files.neuro-flowgroup.com/uploads/1/3/2/6/132682585/241341.pdf
    • http://files.transgresspress.org/uploads/1/3/1/1/131164538/985117.pdf
    • http://files.stignatiushicksville.org/uploads/1/3/2/6/132696414/kufuwenokux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/35768675370.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/17360044683.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/80284973416.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/48250405010.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/wutegazadujewuzegevituwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/wukuxuwatalomekaseluvupez.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/lepitewimirajoteju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59577082877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627b.bin
e9d64e52ca11ea42cb98bfd33bca9ed208d8953e0b4972e49b109d6be215f64c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5312 bytes
font_01_sfnt_off0000745d.bin
6c99078d7a45caf110817383b3c44629c7311b87d138cb600dd4a4b77a7bbccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 10144 bytes
font_02_sfnt_off000096f2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F2 4324 bytes

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