Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d9e9869ab3d9f7…

MALICIOUS

PDF

36.0 KB Created: 2020-09-17 14:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77bb5736001800e4c7cf5bf08b542c1d SHA-1: a370a381d0d54b557e10aa0951dc6e9bb3303507 SHA-256: 06d9e9869ab3d9f73f0cde24c76bd4d650bf3a2033ab22326aaef6a7799d7232
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a page that likely hosts further malicious content or phishing attempts. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to attract victims searching for specific 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.link/wix?keyword=physics+cutnell+and+johnson+10th+edition+pdf+free+download
    • http://vunigu.dougmcdade.com/uploads/1/3/0/7/130776271/6731631.pdf
    • http://files.hyveecolumbia.com/uploads/1/3/1/4/131407057/silaguliteba.pdf
    • http://badejat.gilipalms.com/uploads/1/3/0/7/130776255/8a17aa4945.pdf
    • http://xubofe.mombabymelts.com/uploads/1/3/1/1/131163725/7691676.pdf
    • http://files.lowflying.net/uploads/1/3/1/6/131637218/bosewobedokad.pdf
    • http://xutur.emilyconroykrutz.com/uploads/1/3/1/3/131398589/983748e21.pdf
    • http://wovuf.mylesgrp.com/uploads/1/3/1/4/131437850/zatumere.pdf
    • https://thepiratebays3.com/search?q=cutnell+and+johnson+physics+10th+edition+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fbbeaa0e-a2ea-4b0b-b6b0-b5f77c3273f6.filesusr.com/ugd/140efa_c745618c30e8481dbf993fe12b152b9b.pdf?index=true
    • https://5f2f413c-22bf-4fda-9c99-9550d13d282f.filesusr.com/ugd/a640e9_ea5e77b4d69649239d414139d815fa66.pdf?index=true
    • https://e0ba3c27-f874-471e-bd01-a84935bb5253.filesusr.com/ugd/682d1c_e54f7a52da0f4af397c39c9336e9c1c0.pdf?index=true
    • https://c2f5635b-9c52-487c-bcc7-3b7e8c62b49c.filesusr.com/ugd/c068f8_c320bb4114d042b2ac6891715a84a7a8.pdf?index=true
    • https://2fe1dc0b-0f3e-4c77-ac68-12b804c0357a.filesusr.com/ugd/cc089a_79741ed2507642f79682960c4a06138d.pdf?index=true
    • https://384646d9-0dc2-4c7b-86ce-c37ef713a56d.filesusr.com/ugd/dcbeda_946ff27f790f43ab84d061bb14eb14e9.pdf?index=true
    • https://33ee220e-e6c2-437a-a2dc-879221639591.filesusr.com/ugd/f68081_cc2d8bed6a3841808e8ddc82c688969f.pdf?index=true
    • 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_off00004c0d.bin
f40e52fe12f1ddb4989c5ff8acedee3bbc69b3b6c5d113119b6b05e0a1475a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0D 5708 bytes
font_01_sfnt_off00005f94.bin
aff9e37262f27f55c7f5fc40455f87c2c7387ec464797007b5b7e64d0abdfecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F94 10336 bytes

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