Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d916cd06a8ca2c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-24 07:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c7407e4c1fe4b8e497ec332a6b564d5 SHA-1: 0c26f872f7814254f2f53b90857aa8198e27e8c9 SHA-256: b8d916cd06a8ca2c0f6f0cbd01d278e5f4428e3c39927a4e823f73a097850cee
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the text "Debating adjudication template" and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many pointing to Shopify domains, indicates a link farm used for SEO poisoning or to obscure the true destination. The ML classifier strongly flagged this PDF as malicious.

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=debating+adjudication+template
    • http://xinifupa.eclexica.studio/uploads/1/3/2/3/132303035/jupebewowulumaw-ruxidur-dulobo.pdf
    • http://files.ipdutexas.org/uploads/1/3/0/9/130969673/5c5d558b2ca59.pdf
    • http://files.rick8.com/uploads/1/3/1/3/131383775/waxivamu.pdf
    • http://files.platypire.com/uploads/1/3/1/3/131381078/ditinedujoraja-gavugilar-zonoxobem.pdf
    • http://kebara.ouimassachusettslawyer.com/uploads/1/3/1/4/131407067/a1c4b378c076.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/widomala.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7239/files/doraemon_cartoon_photo_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/bangkok_attractions_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/canteen_services_research.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/vuzegizepelinife.pdf
    • https://cdn.shopify.com/s/files/1/0438/0878/4541/files/juwexunadelumewogiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/sodium_chloride_certificate_of_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/broadcast_news_writing_reporting_and_producing.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/menovabazekuvabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/39709375837.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/quantitative_chemistry_molecular_weight_and_mass_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/pubikilojaxegoxojexujun.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_off00005253.bin
6fbf8193a81e7d16ea771e6deda52fd84db4438047e6d0d97fb46048c2e3d8d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5253 5332 bytes
font_01_sfnt_off00006462.bin
d83f6f892822997daf50a548f9d6ce088059cbaaf2e4ad3509166f4877e79f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6462 9284 bytes

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