Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ebc59da5ce04be…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 11:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8034be9974d47421c8d8e76f208d33e SHA-1: 501f22714f63a50a2529e9353febc6837c8ce2ad SHA-256: c2ebc59da5ce04be2f9839e4cb7c1dff35946fb27ffd445b334c6e7523d17785
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of these links, https://ttraff.cc/pify?keyword=r%25C3%25A9daction+des+actes+administratifs+pdf, points to known malicious redirector infrastructure. The presence of this link farm suggests an attempt to distribute malicious content or conduct phishing operations by leveraging numerous seemingly benign domains to host malicious files.

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.cc/pify?keyword=r%25C3%25A9daction+des+actes+administratifs+pdf
    • http://files.kghortho.com/uploads/1/3/2/7/132741389/13cb06.pdf
    • http://files.shelbyhelpline.org/uploads/1/3/0/7/130740090/6496d2a9a3f58de.pdf
    • http://files.bahaisofcarrollton.org/uploads/1/3/2/6/132681824/ce64180000f.pdf
    • http://files.sharoncraryhandwovenrugstapestry.com/uploads/1/3/2/3/132302982/kabedolafepo_tilewex_vozokekab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/kikowututufibimamifofuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/sujef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/magnetic_boundary_conditions.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5993/files/buffalo_wild_wings_nutrition_info.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/98133656616.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xibazukikamemawamiwemin.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5715/files/jatubigibevininojazarikuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/87817279130.pdf
    • https://cdn.shopify.com/s/files/1/0440/3026/3446/files/67775843943.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_off00005c32.bin
049759c31496f3566f43d4d5e51ef7302c18a5674f69188028a953cccbebdcc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 5416 bytes
font_01_sfnt_off00006e48.bin
8a80fc1f183553c5cec9d4b2f544ce63f02076876e7e2c9a09195e1d6b00510a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 11444 bytes