Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfb6524f1d72722…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 06:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aa41b7976ad22cc407040ab598ebf2f SHA-1: fd9d420cfc9bfebc2c1340a7fd3a28174527e09f SHA-256: 6dfb6524f1d727222687818043d47e612f3d2c52c6c3aa70a4273126c10c0580
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector and a link farm. The primary malicious URL identified is `https://ttraff.com/pify?keyword=autothermal+reforming+reaction`, which is likely used to lure victims to malicious content. The presence of many Shopify links suggests an attempt to blend in with legitimate content while distributing the malicious redirector.

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=autothermal+reforming+reaction
    • http://muxup.globaltakeoverfx.com/uploads/1/3/1/6/131637814/743cf41ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/pakusebabagapenov.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/salewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/gibamitagunipowuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/28174753854.pdf
    • https://cdn.shopify.com/s/files/1/0447/1599/9386/files/curriculum_monitoring_and_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/zuwurutosilow.pdf
    • https://cdn.shopify.com/s/files/1/0440/8649/3349/files/11559821059.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/32208553286.pdf
    • https://cdn.shopify.com/s/files/1/0430/4499/5221/files/bamalelinubi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/14536031611.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_off000064e2.bin
59699d6ff8d325fe0da1e144d225bc42d6035a0ab86bc3fdb750bf8011ef8159
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 5108 bytes
font_01_sfnt_off0000761d.bin
d8a97e6b5ba6aeb51c92793858585243a80135526b9e32ba9ca6d18f2f64e2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 10564 bytes