Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa1109837edbb1c…

MALICIOUS

PDF

38.1 KB Created: 2020-07-31 13:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e46f5a9e06cb5c1eb2b110f1f6c671 SHA-1: 90ede09628419694d2228fc07905509133d15fb5 SHA-256: 4fa1109837edbb1c37f62f0dfb2b227dac1e18aed6224e349ba6063efb38ee9a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to sheet music, suggesting a lure. The presence of a link farm heuristic further indicates an attempt to drive traffic to external sites, likely for malicious purposes.

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.ru/pify?keyword=canon+in+d+piano+sheet+pdf+easy
    • http://files.iowamavericks.com/uploads/1/3/1/0/131069992/521b1.pdf
    • http://files.clemsongammaphi.com/uploads/1/3/1/4/131453823/1e0ee.pdf
    • http://files.acmechassisfactory.com/uploads/1/3/0/8/130813427/xosemizifu.pdf
    • http://files.heartlandwestfargo.com/uploads/1/3/0/9/130969658/1d37df34.pdf
    • http://files.acmechassisfactory.com/uploads/1/3/0/8/130813427/xosemizif
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/26439884613.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/netozidisegenanima.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/76961327771.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/lezizegalakanaxatusoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/juxulabikobekirorimisijuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/xawewumaragafeletuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/22793501800.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/juwitapuzupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/18392885401.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/87413157313.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/1669848530.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/35707056620.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_off00005656.bin
4172b8680a92525ee1d6c77fd893f1e64690675c8ba69e2301d8f455aa35dfe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5656 4912 bytes
font_01_sfnt_off00006717.bin
b49e627cb3cfd4123394825d8a7096b37144a9f9890bad35e1bf89ca8fa02e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 10120 bytes

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