Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b614071e3ba0f52…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 07:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a324e99014014137160037035d659dca SHA-1: c4b7f07d15dded27115916e68c6352709f0e1bd1 SHA-256: 0b614071e3ba0f527a9d2889ae8e80f6d266c90c115be4d967e20ddc167b6575
154 Risk Score

Malware Insights

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

The PDF document is designed to appear as a BMW X1 brochure but contains embedded links that redirect to malicious infrastructure. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=bmw+x1+2020+brochure+pdf`, which is flagged as a malicious redirector. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=bmw+x1+2020+brochure+pdf
    • http://files.hole-group.com/uploads/1/3/1/1/131163752/7d8550cc88.pdf
    • http://files.ywcahealthandfitness.org/uploads/1/3/0/7/130775380/66803ea831d73f.pdf
    • http://mowupigo.matangold.com/uploads/1/3/1/4/131438474/xuzisejuk_sijuga_goparimuzofun_gebiji.pdf
    • http://files.keydestinationevents.com/uploads/1/3/0/7/130776407/nunozowobawupax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/15882270641.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/xotolijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/vigal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/49937388275.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/48809440732.pdf
    • https://cdn.shopify.com/s/files/1/0430/3264/1689/files/properties_of_bessel_function.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/70136869597.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/bovukitopizux.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/speaking_activities_for_teenager.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/alagappan_medicine_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/vurojaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/9584024122.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006471.bin
89e5df52f0ecda9d89e489d01b27c9c7ed6bb75796df696c36a51d822d839522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 5648 bytes
font_01_sfnt_off00007797.bin
1c915727cc396258b97ba669c79a3e118815fc89515b86edc053c0e5df54f4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 9912 bytes
font_02_sfnt_off000099ba.bin
f1b554a1fa98ec75b3687461416ebf50002c1d870212ba079c0ef25984eedfbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BA 17252 bytes

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