Malicious PDF — malware analysis report

Static analysis result for SHA-256 15910ebefe384d34…

MALICIOUS

PDF

34.8 KB Created: 2020-08-03 08:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34be7fd88a0d1ac212d79f5514caf38c SHA-1: bf3ad0a43f550e4727da7edabca336ffa189682e SHA-256: 15910ebefe384d346cbf0aa0657dc7c336b83a713b28a236067129be47739a2c
174 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/wb?keyword=chamsys%20mq80%20manual`. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The presence of numerous links and the identified malicious redirector strongly indicate an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/wb?keyword=chamsys%20mq80%20manual
    • http://files.divinedishcatering.com/uploads/1/3/2/6/132681992/vasefojim-zilojaj-nunifuzi-davuzaxaxagat.pdf
    • http://files.gravitysuccess.com/uploads/1/3/1/4/131453650/xumenibasibirep.pdf
    • http://files.evangelismfireministries.com/uploads/1/3/1/8/131858791/9106861.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8273/6031/files/guxaxomikobepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/91273972485.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/boposi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/1416290375.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/zezizefinumaguvanotanu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/sorakajefirit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/57748070301.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/8756195156.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/17598506551.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/panepovaxi.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_off00004bee.bin
5900f3b9a9ba2e4b144d60ee60da5c6f07d9a520798415746fb99a47d3ea389d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEE 5300 bytes
font_01_sfnt_off00005dd1.bin
1be71cd544dd67ce4bb739265fc87e90b1e4509fa430b4782afb0e7c81d910d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 9676 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.