Malicious PDF — malware analysis report

Static analysis result for SHA-256 5890623121830ca6…

MALICIOUS

PDF

64.3 KB Created: 2020-08-07 00:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e2ddd8240e8d7222467497c36b65d1 SHA-1: 5c3b861c2ab4f3d2c0adc0f9d5dd299462dea46a SHA-256: 5890623121830ca60cace0eb99cccbc74c575da0266e3963612f2b7c0dd62333
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and text suggesting it's a lure for 'plan de auditoria interna ejemplo pdf'. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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=plan+de+auditoria+interna+ejemplo+pdf
    • http://files.imadeaver.com/uploads/1/3/1/0/131071043/39df4f4b665.pdf
    • http://vanog.spikeofalltrades.com/uploads/1/3/1/4/131483200/sezerexakebiwod-valet-serije-gamaguwo.pdf
    • http://files.paternosterproductions.org/uploads/1/3/2/6/132681647/1132609.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/20853040346.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/minecraft_forums_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/sewujutawafevama.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/21161384571.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/dabamizafagadodemegir.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/medifixokew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/bakifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/ankle_sprain_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0441/3577/6408/files/afcat_exam_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/dragon_age_arcane_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/22979040445.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098e5.bin
436a83cc4c5633f06625510c20c8aadd6877088f606b96ba509c4ab21f7fead3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E5 5088 bytes
font_01_sfnt_off0000a9e2.bin
9857c94a8075f63bd19945fab8d021764579c4fd6569a81599841c1724c18950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E2 6168 bytes
font_02_sfnt_off0000b8c9.bin
146319e20020e5b94447152dc4a66041204976be1c639165cc0780f3e64c9362		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C9 10692 bytes
font_03_sfnt_off0000dbd4.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 16312 bytes

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