Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eabfb552cc231d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 20:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a4397ab3609f772f308fd24dfce25bf SHA-1: 19ff79c3afad4d6d1397745d742a9cce5662ea5f SHA-256: 69eabfb552cc231d8469a8e6dd0217c124de33e3f1aa8ab384b56275d1c4d351
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to malicious content. The document body, though heavily obfuscated, suggests a lure related to vehicle registration renewal. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic.

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=vehicle+registration+renewal+form+va
    • http://files.ayanakyounglawllc.com/uploads/1/3/2/6/132681398/42eaadf4.pdf
    • http://files.smcteamc.org/uploads/1/3/2/6/132682585/vipilamaroxobuxer.pdf
    • http://files.capits-jewelry.com/uploads/1/3/0/8/130814193/9547546.pdf
    • http://files.brphotography100.com/uploads/1/3/1/4/131437750/fevalokitawe-tutat-teruf-dedisoxaxizuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/58890254123.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/busurogixik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/zexavuzofezidixoxekikov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/19728698051.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/kubile.pdf
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/saxon_algebra_2_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/17799114240.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/74328362792.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/pexamozalezop.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/vavakeruwewesiwezir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/37058350439.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_off00005ba3.bin
7a7c31631fec131c5f4114f6731ae4287ef6c948b187416d0c36f12d9385b3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 5412 bytes
font_01_sfnt_off00006dfa.bin
f742432d34c20db9b0c26bcdff4d13b0f3f82d88451b9e74f04af59c739bbe3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 10032 bytes