Malicious PDF — malware analysis report

Static analysis result for SHA-256 257c94a7f2539685…

MALICIOUS

PDF

48.1 KB Created: 2020-07-29 19:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1db37b885ce691d88e6233e84425738 SHA-1: e084e41c7153e3d3213e0229cee94f2f7f632f92 SHA-256: 257c94a7f25396859fba2fca811a1a6988b530643aef9eb6e482de0eca99288a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'ttraff.com'. This indicates the document is designed to lure users to malicious sites, likely for further exploitation or credential harvesting. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine ranking for 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.com/pify?keyword=advantages+and+disadvantages+of+probability+sampling+methods+pdf
    • http://files.rockanieguitars.com/uploads/1/3/0/7/130775174/xowelinakox.pdf
    • http://files.naturesblissjamaica.com/uploads/1/3/1/4/131437276/7812803.pdf
    • http://files.jakessalesandservice.com/uploads/1/3/0/8/130814676/xudanetir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/rezidek.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/11026502619.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/gazowuvozejozofotaxuwil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/41040751141.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/2806616916.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/zipogededebokatilodupik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1046/5698/files/butanasaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/45733406878.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/22558572993.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/toxibunikudiruwel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/53859799716.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/gakizidirowagururudavawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/7587236527.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_off00007c5f.bin
2cee6ac6fa38323413aff2e96bfe51772336aed311e2f54626a502e3d5efc84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5F 5532 bytes
font_01_sfnt_off00008f02.bin
338d6b3dc65e50d978987e6f84fb84d330c738b9981922703e5080903a093389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F02 10312 bytes

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