Malicious PDF — malware analysis report

Static analysis result for SHA-256 107cf26b0ce07dfd…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 21:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ac2ddf49052615f1bbb26be00e21c35 SHA-1: 6d6b1b0cc30abb9e6d89bafd57a4ebec3ebfeecc SHA-256: 107cf26b0ce07dfd50bbfdef13da1e5001f26e9009dba9156e9a1891bcb35ea6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, masquerading as a manual, that point to a redirector service. This service is known to lead to malicious infrastructure, indicating a phishing or scam attempt. The document body itself is heavily obfuscated, but the presence of embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

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.cc/pify?keyword=bomb+calorimeter+experiment+manual+pdf
    • http://files.romanzapata.com/uploads/1/3/1/6/131637218/godapof.pdf
    • http://files.sofafoundation.org/uploads/1/3/1/3/131384127/8503099.pdf
    • http://files.royaltjewelry.com/uploads/1/3/1/4/131438036/vusutawiv_bivavaruzamojix_naxavulafazi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/kafam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2024/6427/files/9107177581.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/daxusekiwiriloludorup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1263/7351/files/doluvamuwarapamomis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/sufopamos.pdf
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/jspdf_autotable_header_alignment.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/vikibibageluruvenesupu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/nazetadamovawumuseguf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/21682403659.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/recette_de_cuisine_algrienne_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/resujilatitotativesuxusis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a06.bin
7f31ce7e4e9527a51eecccbf205910313f7fc7bb272fa9fd73003eda6ae5735f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 5380 bytes
font_01_sfnt_off00008c38.bin
8904a5628e95b7f5f2cd3361ec953c11e09c9019f8869102ddfcb1cd29d5a80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C38 10420 bytes

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