Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f64ed83dfc415e…

MALICIOUS

PDF

45.0 KB Created: 2020-07-28 22:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e486fd2f8011e942aa3b0349dd3f4f SHA-1: a5f2eea6c31479d7f3169e8ce331e68981109b95 SHA-256: d1f64ed83dfc415ea76a74bb9f9bbc63570fc171636c77e4277c0e66104bc73b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, appears to be related to academic material, suggesting a lure to disguise the malicious intent. The heuristic firings indicate a malicious redirector link and a link farm, supporting the conclusion that the primary goal is to redirect users to harmful sites.

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=calculus+early+transcendentals+4th+edition+rogawski+answers
    • http://files.miniaques.com/uploads/1/3/1/4/131406348/fimaba.pdf
    • http://files.doaneyip.com/uploads/1/3/1/6/131606193/19666e92929.pdf
    • http://files.shepardrc.com/uploads/1/3/1/4/131453674/bivonasedubig-zuxoxipegitum-janoferixekevif-nufodagubid.pdf
    • http://files.shepardrc.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/bamerikizojixemidabawiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/53661811160.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/naduz.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/jirazevapigini.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/19510216886.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/lodajifizimiwize.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/78629939264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/sijulebojude.pdf
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/xatefolavonujurupeviza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/66194438638.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/76345000684.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9697/files/guvij.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/verenikodep.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_off0000704e.bin
8ea25bd588bf1cb4f20649128f3f4c9a1fa4c3ad4a74abea74eaa2edfb8e02f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 5452 bytes
font_01_sfnt_off000082e7.bin
7edaa1ff1b604d4e9241ac07a1d42eef75c7cde2e6fda4e1d01b11f73110c93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E7 10344 bytes

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