Malicious PDF — malware analysis report

Static analysis result for SHA-256 84242ba81402a6f3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-03 09:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ec47a0248b661fcde0cd3881721c0b9 SHA-1: 889df5b19b2a13740ef7f2f24899d28f09163c5a SHA-256: 84242ba81402a6f35e7c3f33be43bc0f39ddaad2852164ff20e8d882a236b9b7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous other PDF links suggest a link farm or redirection tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

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/pify?keyword=the+toyota+way+pdf
    • http://files.benedictnnolim.com/uploads/1/3/0/8/130874026/6207320097.pdf
    • http://files.wxhercules.com/uploads/1/3/1/4/131452904/popusowivabit.pdf
    • http://files.lakesideexotics.com/uploads/1/3/0/9/130968962/gutogis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/mame_dat_files.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/19069217337.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/2008_ford_focus_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/85732169325.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/schumacher_se-_4022.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/98730584439.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/57164135250.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6783/files/54736065139.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/8601102765.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/42084581478.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/88232802747.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_off000069b8.bin
fd7b7b0198e9681eca2af627e4e734d7daac181d54afbdf0b211e76033df6a53
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 4964 bytes
font_01_sfnt_off00007abd.bin
9d2010b0183e8371b99e7eb24c95945fbd04d47f6c405a65c9d10761bba60917
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABD 10496 bytes