Malicious PDF — malware analysis report

Static analysis result for SHA-256 1810089225c72af0…

MALICIOUS

PDF

56.6 KB Created: 2020-08-12 02:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3e4555efd6bc6080c276d7fbb1873b SHA-1: 65488bdb93ec6137e616b5dc1b7181f6bd2685e6 SHA-256: 1810089225c72af0578fa81072e0b01a08e5a9b9c6289d8b0b4144726d98d0ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is part of a link farm that hosts numerous other PDFs, suggesting a campaign to manipulate search engine results or distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful 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=el+paraiso+perdido+poema+pdf
    • http://files.siallabuzz.com/uploads/1/3/0/7/130776200/3307298.pdf
    • http://ferope.lawrencerainesmd.com/uploads/1/3/2/6/132681670/7427578.pdf
    • http://files.ycducky.com/uploads/1/3/0/9/130968958/56eee7d67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufowotipopugisafe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/kirabalalav.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/what_is_a_google_id.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/26067810824.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/agriculture_books_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/73919106747.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/xodirokolorabowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/85195174776.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/introduction_to_blockchain_programming.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/30959571193.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.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_off00009f37.bin
f34ca79f5d8b2e909e29b79b3ea3485ac9d5b3e820eaeac21ccf3782a2c1c8b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F37 5144 bytes
font_01_sfnt_off0000b099.bin
a1963d92cf0676bc9541ab691a3e136fc6e95f8bbd23186a51d8f281304e9451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB099 11260 bytes

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