Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a97c29077ef4d7…

MALICIOUS

PDF

47.7 KB Created: 2020-08-01 11:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1bba4a4117eea9a272be396f1d77d1a SHA-1: f6a1cd8b25c095f237d38d94f2c877d840c74c0b SHA-256: 24a97c29077ef4d7509371a2e86eeadb98e32179127b367d3b2557570a8c9faf
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.cc). The presence of a large number of external links, many hosted on seemingly unrelated domains, suggests an attempt to manipulate search engine results or distribute malicious content through a link farm. No scripts were extracted from this sample, but the extensive use of external links is a strong indicator of a malicious distribution or redirection scheme.

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=strago+lore+guide
    • http://files.friendsnorthcreekforest.com/uploads/1/3/2/6/132682235/bafukazam_mipupezibipag_diveza.pdf
    • http://files.canyoncitygrill.com/uploads/1/3/1/4/131407459/719052.pdf
    • http://files.herdiselmend.com/uploads/1/3/1/3/131379991/2de446ac5.pdf
    • http://files.bethelumcsi.com/uploads/1/3/1/0/131071256/buzejanavazewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/fekasodoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/57594670756.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/73805157827.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/galejir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/80940919308.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/wumufetotularoviko.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/52944171999.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/jofugakixujusojebomukupav.pdf
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/fewesewatomazuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/wavabidodoxolirazuraxudiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/tebajumeleke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/49048756258.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/fixaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c8e.bin
37a221c9ea213acead98351a092800d747d1a276150e6ff62a14cff0a9a3d56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 4888 bytes
font_01_sfnt_off00007d79.bin
2aec8b3cef727a74059b984a6b3c4fa8a4cf3c4bd904afad12bed8333fbae5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 4916 bytes
font_02_sfnt_off00008e3d.bin
cbd24ce573fb50ad6a65390904d1d9abcb514d69d9f563cd2b1c6120709573b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3D 10356 bytes

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