Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66ba7351718ecdf…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 07:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c90a8a83f6afac6b97bdfb0ba9b90b9b SHA-1: 0d068bfdf846ee0b2d04c9b18b68e28e76b8436f SHA-256: c66ba7351718ecdfbe5d0b834a652cd939c32e058b263d5f91241c3cf9d5e97b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a game-related keyword. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to external malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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=tales+of+vesperia+giganto
    • http://files.nwhypnosis.net/uploads/1/3/1/4/131438389/bakorurafadukilit.pdf
    • http://files.phchastings.org/uploads/1/3/0/9/130969573/b4f516e65e2266.pdf
    • http://files.holycommunitychurch.org/uploads/1/3/1/8/131856492/gopasakuwurirawono.pdf
    • http://files.davidalexbateman.net/uploads/1/3/0/8/130874055/1801123.pdf
    • https://cdn.shopify.com/s/files/1/0439/4637/7374/files/94458886051.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/lebovamigojomudaxapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/fisher_iris_data.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/2413449765.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/30326965205.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/pudalojemusatupax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/dapuvitez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/rorakejapaxepu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/jazukugepudozepux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006185.bin
138a4b8af744850c6d506f9b3b37a17dfd4b62a922f82fc4d605c7b343bda237
pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 4868 bytes
font_01_sfnt_off00007228.bin
f0b36a85431619645694fd9a2884bdca69a76d1c2f6fc6dd7c90d0276919ded5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 10064 bytes
font_02_sfnt_off00009490.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9490 4324 bytes