Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1f90d6098404db…

MALICIOUS

PDF

39.4 KB Created: 2020-08-04 23:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9a20850b3f6bbcc93990488752a7da SHA-1: f1640ac84cd405cc362536dbb72c7dfc9332c6e5 SHA-256: dc1f90d6098404db365ecc555b615b9dff8e9e4f0a3fc0e716b4abc2998cbebe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to PDF manipulation and includes the malicious URL. This suggests the PDF is designed to trick users into clicking malicious links, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=mac+preview+add+png+to+pdf
    • http://files.blisscosmeticsaustralia.com/uploads/1/3/0/7/130740524/ravifewex.pdf
    • http://files.mccallsferryfarm.com/uploads/1/3/1/3/131379012/2095271.pdf
    • http://files.unlcafa.com/uploads/1/3/1/4/131437532/8767310.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/immortals_lyrics_fall_out_boy.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/nesefatowuxogurat.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/19034487317.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6422/files/93393080733.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/23282022000.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/fatijofad.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/44397054040.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/the_simpsons_tapped_out_hack.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/dimuzidewagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/jizewifevewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/gijomorofipotapativalo.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_off00005c4d.bin
09ed9b8f1add5aa28e967c3ff3e48c27cd5a26c5eabf2d3cc6c9a04131775abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 5268 bytes
font_01_sfnt_off00006e71.bin
45ece28bd64ed50bb585628e41ebf2debfea1c4cbc62caebbf604922181c5ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 10060 bytes

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