Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e5efa397f572e9…

MALICIOUS

PDF

44.7 KB Created: 2020-07-09 22:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0509372e3c06cab65f19df600f5c3b81 SHA-1: 9687ddd62c7e528a9893cbb608f37e9412f2cb9a SHA-256: 07e5efa397f572e9d34ec10c6766b89b56daa2e452e2ed884558e9ed01ae7941
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to a redirector and a large number of external PDF files, indicating a link farm or SEO manipulation tactic. The presence of a malicious redirector URL suggests an attempt to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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/wb?keyword=african%20american%20religion%20a%20very%20short%20introduction%20pdf
    • http://files.lordofmath.com/uploads/1/3/1/4/131409055/gajukeraxijuvofi.pdf
    • http://files.clarksvillemusic.com/uploads/1/3/2/6/132680932/jufuroneg.pdf
    • http://files.maryimmaculategallatin.org/uploads/1/3/1/4/131437471/9235714.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • http://files.mattkuphaldt.com/uploads/1/3/1/4/131454238/7750511d28.pdf
    • http://files.westboroserve.org/uploads/1/3/0/7/130739488/1063422.pdf
    • http://files.tunup.org/uploads/1/3/2/6/132681767/f6109.pdf
    • http://files.ccjsermonstorage.org/uploads/1/3/1/0/131069910/a3d4287.pdf
    • http://files.onemomentofpeace.org/uploads/1/3/1/6/131607023/gosiwosoxijisoj.pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wimaped597797669.files.wordpress.com/2020/06/81359005811.pdf
    • https://nafegef.files.wordpress.com/2020/06/zutumabobuluvolox.pdf
    • https://mevarariruw.files.wordpress.com/2020/06/bovetuwoxebodotusejotore.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zodotuxufaliga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.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_off00007004.bin
2a053f19852122dfda232df807740c026c6e35c6c80d644f5478f0e9c75e4652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 5604 bytes
font_01_sfnt_off000082e0.bin
209741d4690dd5401b0114bcbcd9290bac593e595ac1a958d71c8c7766cdd2c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 10008 bytes

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