Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd40fdfb47e38cf…

MALICIOUS

PDF

53.0 KB Created: 2020-07-31 15:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005e211b15d28b8e95a0f1a497116c21 SHA-1: d4836358255ba855bb0182b6f928b158434cae53 SHA-256: 4cd40fdfb47e38cf8c592ea86522c96fc4ef3a1b23b1e2206ae14338e2d23807
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.cc/pify?keyword=south+bend+heavy+10, is identified as a malicious redirector. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggests a phishing or scam attempt designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=south+bend+heavy+10
    • http://files.browncountymuseum.org/uploads/1/3/1/4/131407511/zenejibenexoxor.pdf
    • http://files.practicejoynola.com/uploads/1/3/1/3/131398461/tenuxapiweposod.pdf
    • http://files.takeyourchancetravel.com/uploads/1/3/1/4/131407406/e041d3a32a2f.pdf
    • http://files.drjessica.ca/uploads/1/3/2/7/132740234/9228330.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7688/files/14108337469.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/sipubitelafujamijukesas.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/xakejil.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/19130898990.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/96087454132.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/8486192537.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/13331786290.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/fudem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/mezolap.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/96507536956.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/82372081193.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090c7.bin
fae6d78a67f484c1a0c6b39540e122fab0134c77395d0fe600d583834b846685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C7 5040 bytes
font_01_sfnt_off0000a1e7.bin
7fb2366a0b6555d71090cf2069d3c17740edf71ca18a9ffbaf3caa345fd59eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E7 10756 bytes

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