Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef29fcb52964f43d…

MALICIOUS

PDF

58.4 KB Created: 2020-08-23 01:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dde06d4963db9f5325503e7b594da60f SHA-1: d21e11fbc6aea4f6acced8d8505b25f26651c357 SHA-256: ef29fcb52964f43d8181efd85443eefc14ea763a359f733b190269b9dc3abe7a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing this finding. The PDF also contains a large number of external links, many hosted on Shopify, which is characteristic of SEO link farm abuse to distribute 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=speaking+activities+esl+beginner+pdf
    • http://muniloged.simplysensational5.com/uploads/1/3/0/8/130814110/70aff9bfe9.pdf
    • http://zilezoze.investwithsmdc.com/uploads/1/3/2/8/132814956/zutuzifixi.pdf
    • http://zujefimu.robertssurf.com/uploads/1/3/1/0/131071157/3cf947d4c104d9f.pdf
    • https://cdn.shopify.com/s/files/1/0437/1379/0102/files/huntington_bancshares_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/71222449240.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/wavafidakatilef.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2717/files/teselolujiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/weronutiwaguburen.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4527/files/physics_walker_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5209/files/bossam_v6_pc.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/telugu_holy_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/mathematical_analysis_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/zirezawenabajimokapufub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7383/files/biblia_dios_habla_hoy_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/47160738240.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5a4.bin
7989afe73ae7453e343e577f7f6ee58a218e192409d7ec5dc70cefa6eec69e4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A4 5692 bytes
font_01_sfnt_off0000b90e.bin
f1906d74adffcbc502d0953c19e9b8dbc7a3f383033abdd4a7c80c34556408ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xB90E 10348 bytes