Malicious PDF — malware analysis report

Static analysis result for SHA-256 740db6ef269ac308…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 22:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85eedc7a10fed8d3b80941f2bbbdaa87 SHA-1: 2c183b8c6551f1c1b6a148f9575812fe69692b59 SHA-256: 740db6ef269ac308e8ef687ecddcfaedf7d6cc035e8dbea11f3093433b560341
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body includes the URL 'https://ttraff.com/pify?keyword=enqueue+wordpress+stylesheet', which is identified as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm, likely as part of a phishing or scam campaign.

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=enqueue+wordpress+stylesheet
    • http://pojezil.thefqc.com/uploads/1/3/0/9/130968921/5329299.pdf
    • http://zarupiv.vincentsgermanshepherds.com/uploads/1/3/2/3/132302868/2926444.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/ausable_river_michigan_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/66781262016.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/zitudojura.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/27342027576.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/8119842291.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/wozodudelisalugabuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/vixov.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/29742137988.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/10415738749.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7185/files/gb_whatsapp_uptodown_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/70707883740.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/62406719034.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_off000064f5.bin
5b2b13f5ebf9b2df997f6af5c8c44fe8b837a5eb6ae5c12a7701af8ee7af9a0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F5 5112 bytes
font_01_sfnt_off00007668.bin
7d1665a349ea05daf68c8d8ebc92d19468e90ae56e91260c77addc74b9bf7ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 10440 bytes