Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ad307a3bf3e500…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 00:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06d0fd4dfacc87a9b6006e6e30cccb3 SHA-1: 6f1fe0b0ec20123c2fd193b3de4c48b480a3c7bb SHA-256: 72ad307a3bf3e500157c42a1000d375952040b2e4bd19069e3932896fdd49ed2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a motor cable selection guide. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and malicious link indicate an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cable+selection+guide+for+motors
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9421c8_51d40d98f0f243adb7f588807f2f6138.pdf
    • https://static.usrfiles.com/ugd/4f270c_38524723072a4d4aa9f670c93a61e24a.pdf
    • https://static.usrfiles.com/ugd/ac51ce_758da088238144709c97cc084115b17d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c00e3fd763d49aeb52b56d4275fa331.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d679de417aa405f91780757c8d963ec.pdf
    • https://static.usrfiles.com/ugd/c068f8_0fe75227170e400d8a5e7b75e4667734.pdf
    • https://static.usrfiles.com/ugd/b8c837_1410f3e0148a46feb1339822ff8d32aa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/97790349388.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/valid_us_address.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/31340845371.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/fexozuzuralamometerataw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/extra_deep_fitted_sheets_king_size_bed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/2348603322.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/mizabubude.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_off00005e93.bin
245e9b5ce12978c6550e9b06afa774dd1b3c2d41cbc4fc507575fc4cbc6d601a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 5384 bytes
font_01_sfnt_off000070c9.bin
a01e9d5f906b579d47ad9741e491a0340e1a90776da6b69f9c120138ba6c1a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 11256 bytes

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