Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e347e7ff3f9137…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 02:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9dc71f74fdbc82591caeef80d44316 SHA-1: 2ed1dc781f1c9efee2578b7d59a33cf66321be81 SHA-256: 14e347e7ff3f913757cae7f0154fd82dda5d5d4388924bf3d8fc23ddc6d3a7e9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Gta 5 lester assassination money guide' and a URL that aligns with the malicious redirector. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, many of which are likely malicious or part of a link farm.

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=gta+5+lester+assassination+money+guide
    • http://kivudep.vanaudelanalytix.com/uploads/1/3/0/7/130776106/37278.pdf
    • http://files.dairyflatponyclub.org/uploads/1/3/0/7/130739142/vidibobipal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/how_to_convert_mp4_to_wav.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/cuentos_coaching_ontologico.pdf
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/22740400950.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/74842772284.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/free_anger_management_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/75455177060.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/31839810485.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/62284310245.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/53365051252.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/likez.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/wiweremunanevul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57896919986.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_off000069a3.bin
103275fbdc06ba08d65b375e40ecff7f9d093bb1ee18d82b3e1c5b97fff5ce65
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A3 5400 bytes
font_01_sfnt_off00007bf7.bin
e89f7bdda03a0155569984892ece1f00288285c9cf7573a644d554838b39c951
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 14600 bytes