Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9a2c912aa00ca8…

MALICIOUS

PDF

34.1 KB Created: 2020-08-28 23:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3c1ee174fa84b46af608e5b3ebbff3 SHA-1: 0239ced9460b8a1b9f41d72c086cba275a96e3be SHA-256: 7c9a2c912aa00ca8758a4b0d6a833000480516b5c283414486bd67311c762a99
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to click on it. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links.

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.com/wix?keyword=comportamiento+organizacional+robbins+10+edicion+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e0ec9d01b5224ac2b0db595c21313d7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5dee72b39b8427087733b168de09a7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_47bf84b640f6426cb4871c64fbd75f2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec98312f23d4465883f3d64519f1ab75.pdf
    • https://static.usrfiles.com/ugd/b8c837_791fd0c048c3440aaea525b831fe53db.pdf
    • https://static.usrfiles.com/ugd/b8c837_c158ba2cfbc04189b35daf60ae48f1cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4f7ac90e6dd4d6b9195487a5d661922.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47872eb1fc74acd89e7d333ae2f581c.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e7b55853824b1d8aa276587fab3c5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a08abdde3d64b1598a162903453a622.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/87472118526.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/bazofupikotedutonubivov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/dazudixetuzumidujogi.pdf
    • https://static.usrfiles.com/ugd/b8c837_104429310784427597f36086697bba8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac398deca5044b7582632b355e49fdfb.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_off00004734.bin
d9c870ea982a2dc51ff805ad2f79d57a4b92e91015d93d16b8e3cb4fa18850a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4734 5764 bytes
font_01_sfnt_off00005abd.bin
9f6826d4be15a532631da86faaa35de0d40f7de09b33165eed5ef61b5a425384
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABD 9932 bytes