Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc10df29b76bb22…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 05:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25cddb59d28ab039e381bf268d2bd856 SHA-1: 92506cce5bc7cbc280b03081ed2a1331e44fbb41 SHA-256: 0fc10df29b76bb224871a8bec5293cf07a44a23752940cbcf32856a4b9e1bb08
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. This suggests the document's primary purpose is to lure users to a potentially harmful website. The presence of many links, including a large number of PDF links, indicates a link farm or SEO poisoning attempt to drive traffic to malicious infrastructure.

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.ru/wix?keyword=the+practice+of+social+research+14th+ed+international
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/79cb75_b31e25ab372146bc8d1c330d9a6f16fe.pdf
    • https://static.usrfiles.com/ugd/865d50_da31ce5db3344a4ab260364367ff0053.pdf
    • https://static.usrfiles.com/ugd/a86d68_75b12596946e4decba27eab867e859e4.pdf
    • https://static.usrfiles.com/ugd/8e1900_4a6a57738cab4cad82a01405c364f537.pdf
    • https://static.usrfiles.com/ugd/f96b02_021f961edec54ea3b091708f1f9b5ee5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7926/files/46076504127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://static.usrfiles.com/ugd/086daf_3ebcba5c69bc45fa8ff909fa94e73170.pdf
    • https://static.usrfiles.com/ugd/b8c837_79014978337143ef8aa256f3ebac420b.pdf
    • https://static.usrfiles.com/ugd/b914b5_70276cf599b741708142a88b516bdd68.pdf
    • https://static.usrfiles.com/ugd/97368a_8765bdac77a64c95a7f650e7b0925075.pdf
    • https://static.usrfiles.com/ugd/4c1554_bc20ed0937e143ab90cc952cd8a87736.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2fbf2502bc746fe86a3c4dec6c5054f.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_off000053e1.bin
458146ce481245ca0cc8267e1c41048587ea6f7e3362d41e0e053dbfada33abc
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E1 5120 bytes
font_01_sfnt_off0000653d.bin
a6c83bf0473cd5f901a4b345653a98c58862b6bc676916290d57c83ab97ee075
pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 10144 bytes
font_02_sfnt_off000087cd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CD 4324 bytes