Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6248393e36bbc7d…

MALICIOUS

PDF

51.9 KB Created: 2020-07-27 00:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebba0b9d9ef17937619378405b8e97a1 SHA-1: 775b72a92516a7b9ce3e7b2d526db599e275f475 SHA-256: f6248393e36bbc7d9e07d0329d991d665548a78749ca55980e3a926c21dd7a3d
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique commonly used to redirect users to malicious sites. Specifically, it links to a redirector at 'ttraff.com' and a large number of PDFs hosted on Shopify domains, indicating a link farm. The ML classifier strongly supports the malicious nature of this PDF.

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=sqlite+index+insert+performance
    • http://files.powtronicstech.com/uploads/1/3/1/3/131383510/1907633.pdf
    • http://files.avtarindiatours.com/uploads/1/3/1/4/131454699/kuvovenuko.pdf
    • http://files.costaricaherbalmedicine.com/uploads/1/3/1/3/131379894/7047721.pdf
    • http://files.alphakappa32.com/uploads/1/3/0/7/130739783/bameburifukojogexire.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/xopanoxowuforobejogan.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/59314378553.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/mivodekilijitulijorima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/28110989612.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/60595108740.pdf
    • https://cdn.shopify.com/s/files/1/0439/7488/5534/files/83926675302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/39148913971.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/tovum.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/12588135781.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_off00008cd2.bin
18e940da87d9a848fe5126d2a94be6486d66bab17b47001ce9b6a1fe58f3755f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD2 5384 bytes
font_01_sfnt_off00009efb.bin
39a5bad0a2aa641679b7440b0dbff2d89f63f2222704a6328a6f190f25006f77
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFB 10396 bytes