Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa99261bce22e9c…

MALICIOUS

PDF

36.0 KB Created: 2020-08-31 21:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12fa858ea70b52645146875b30e30003 SHA-1: 62328ffe33759ae605898b82617312763c2c90e2 SHA-256: 5aa99261bce22e9cd1262d73b3d79a18e7629cc3c091259cbe5e935dd0c171e2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains text that suggests it is masquerading as a manual. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a malicious site for phishing or malware delivery.

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/pify?keyword=canon+ip110+battery+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/08fe48_d799097f4fd0435cbc4dcf43085560d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebaa5da43e824dd68ca5ff8a5f2a29fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_484be42ced9b46f7a6d9f943a8033444.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/jexigajivafodododawu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3034/7675/files/academic_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/twitter_header_image_template.pdf
    • https://static.usrfiles.com/ugd/824332_e6a93a3b9f2d4df1bafd4cbe1ed1cf4b.pdf
    • https://static.usrfiles.com/ugd/1813b3_c77a471babb34ceabe6031ad3c0740a6.pdf
    • https://static.usrfiles.com/ugd/7041e4_5c6c81ccf1e34bc59d0242eb14799e06.pdf
    • https://static.usrfiles.com/ugd/15cd4d_05d99776667b4f4e8c0834cbda4a8caf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/bleach_manga_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/scholarship_form_maharashtra.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/penorenutamozo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004697.bin
93deb0d5ea62817b921fccc67e32b340e767de2273541e84bd91e3a88eb4d79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4697 5128 bytes
font_01_sfnt_off000057f5.bin
98208a7c7f0f9d2cc9056ebb436d0af521678201465e1fbb70a76d0d9bd3e465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F5 8652 bytes
font_02_sfnt_off00007583.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7583 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.