Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f332550077dd15c…

MALICIOUS

PDF

52.0 KB Created: 2020-08-24 00:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09379a5aa79934f7abb8c3008a44cf46 SHA-1: 8e5115639954e7b5ff1c53878209c98d71762aeb SHA-256: 9f332550077dd15c06c123029990b0db10635a1b790463d05a308c9f5fa6f5da
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, indicating a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the structure and embedded links suggest a malicious intent, possibly for SEO manipulation or as a distribution vector for further malware.

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=construction+field+report+definition
    • http://files.projectfulfill.com/uploads/1/3/0/7/130776182/2153003.pdf
    • http://ravesenox.greenstonedesign.co.nz/uploads/1/3/1/4/131408899/da4d857ab5a2a2e.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/ximexepixogixuwej.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/vuvugosujetev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/selulowupipixuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/9949994723.pdf
    • https://cdn.shopify.com/s/files/1/0445/8368/2212/files/95249146586.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/dusaxipotofod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/66402988013.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/15917089275.pdf
    • https://cdn.shopify.com/s/files/1/0437/1152/9114/files/paguvepuxirafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/lopivoz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d5a.bin
c94e7032e3a4776b15a806d78ed09241ccc9ee6d16008bf17db977e420ac37e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 4844 bytes
font_01_sfnt_off00007dd6.bin
9fbc36be54d49ca3b9f061c0f95702dff7c64ccffb2be65aca1546e43e4f037d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 2420 bytes
font_02_sfnt_off00008874.bin
4b21062518845b8d136cb8dde7c78ba7e21b19d8f844933cad894ef2b8896e34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8874 10484 bytes
font_03_sfnt_off0000ac64.bin
4f6da54b9804d54fd9288f9f2f533ca25dd4217272638f0a26ea167a6897be9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC64 16676 bytes