Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dff56e53284bf29…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 11:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26e51f73c3d1d583863a0b8a40dd776 SHA-1: ec4c28ee81c729ecc8b0f76778c6500ded1f33fc SHA-256: 5dff56e53284bf291919f579cc2657d543d67a16d156cce11eda5aa0da69f7f4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document also contains a large number of links to PDFs hosted on Shopify, potentially as part of a link farm or SEO manipulation tactic to increase visibility. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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/pify?keyword=null%2527+s+brawl+stars++ios
    • http://jijad.nursegonestrong.com/uploads/1/3/1/6/131636665/wefenina-buxisowunafijop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/22865589440.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/english_interview_conversation.pdf
    • https://cdn.shopify.com/s/files/1/0461/4992/7075/files/98602647955.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/pepibomixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/67625714685.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/windsor_locks_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/atos_institucionais_ditadura.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/96937170200.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/mekezoseguzujajarugoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/animals_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/motemadifex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/catalogue_oriflame.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_off0000604f.bin
4c63891aba9ac1f881ed46249b4873cd625242ba633bef8761fd50218567449d
pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 4912 bytes
font_01_sfnt_off00007128.bin
7c46bc01d10a2124991c757c1da15e60ae110f7c3eefc3532dd31c2ca6cc09fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 11668 bytes