Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc83bbec9da9ea0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-27 16:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7aeb1066b052ff5b5056a14cc9e2c40 SHA-1: c632afd7ec3602aa71adfa5522dc81ec8da59696 SHA-256: 0dc83bbec9da9ea003bf2cad98ca198a0ccdf774689cb6f0244c13e722f4ebee
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious sites. The document also features a large number of embedded links, many pointing to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to direct 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.cc/pify?keyword=the+complete+iep%252F504+guide
    • http://files.lantaumama.com/uploads/1/3/1/6/131606465/9530208.pdf
    • http://files.gracebaptistchurch77.com/uploads/1/3/1/1/131163635/5675095.pdf
    • http://files.virginiacitytreasureisland.com/uploads/1/3/1/3/131380292/soxuvofinawu.pdf
    • http://sesivux.kingfisher-strategy.com/uploads/1/3/2/3/132302868/9874854.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/gelomifajipiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/2103/2859/files/loruvuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/just_basic_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0463/0478/8642/files/nasoligorami.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/present_perfect_tense_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2985/4368/files/96101240568.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/25125419379.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/61848786522.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/zatafevemareju.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_off0000645e.bin
1b31c413d5e68fe3aea324432c145d4dc0adcfdbf2e9a7e9535d7746421323d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 5340 bytes
font_01_sfnt_off0000767c.bin
fdd2f5f15f695b3ef228916bc61820b1eeb0413ca67d4d1aeffc08ff0e3a5bfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x767C 10440 bytes