Malicious PDF — malware analysis report

Static analysis result for SHA-256 678b7b0e8b809483…

MALICIOUS

PDF

38.8 KB Created: 2020-08-30 02:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52353ec306b5946a111979676c2eb78 SHA-1: 445f679684bbfd4e1a769ec62c74521520039453 SHA-256: 678b7b0e8b809483f70feca0140924965782a10476dfc1bb4deda62f74d735d9
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or content distribution network. A critical heuristic identified a link to a known malicious redirector at https://ttraff.com/wix?keyword=time+bomb+bpm+feint. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent, likely related to phishing or malware distribution.

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/wix?keyword=time+bomb+bpm+feint
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/gosaropowepesonobedani.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/weful.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/az_900_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/27356228567.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/zegoruvod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/vlookup_function_in_excel_between_2_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/cooling_tower_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/sixofizafigerazoma.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/pdf_lower_file_size_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/71057956125.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/90327336781.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/loxunazatesefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/gaxamewenezizelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0635/2804/files/junior_architect_cv.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/94081637526.pdf
    • https://cdn.shopify.com/s/files/1/0429/4692/0615/files/reading_certificate_templates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000503f.bin
3ab942a86036f772d658d2c30ad921d6196a5e4b6e05e554314966afea06774b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x503F 4408 bytes
font_01_sfnt_off00005f11.bin
5d9a67fc1dd09a0adb136b48b7d5a1ef9d5d88c9dd5b8c8fa429ce32853fb9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F11 9708 bytes
font_02_sfnt_off00008067.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 4324 bytes

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