Malicious PDF — malware analysis report

Static analysis result for SHA-256 475a33e2736b959e…

MALICIOUS

PDF

43.1 KB Created: 2020-09-08 06:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6646af79ccab1c39aeaebc7b38069c9a SHA-1: 2058ba7958240cb20969e95de88c4c7e59069d99 SHA-256: 475a33e2736b959e28222007430b4c588b20d905cddf0b66909a84c608d00412
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, suggesting an SEO poisoning or link-farming tactic. One critical heuristic identified a PDF link to a known malicious redirector infrastructure at 'https://ttraff.link/wix?keyword=matlab+guide+axes+plot'. The document body, though heavily obfuscated, contains references to 'Matlab guide axes plot' and the authoring application 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The presence of numerous links, including the malicious redirector, strongly suggests an attempt to drive traffic to malicious sites or distribute further malware.

Heuristics 3

  • 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.
  • 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.link/wix?keyword=matlab+guide+axes+plot
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/bokidavebedoluwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6291/1391/files/16021671786.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/android_tv_heureka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/codigo_penal_comentado_cesar_roberto_bitencourt.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/59880702755.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/warhammer_40k_8th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9637/files/6730685984.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/voxin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/laxoniwokuruvudapafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9093/4949/files/31785362365.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/29254279907.pdf
    • https://cdn.shopify.com/s/files/1/0436/3619/5488/files/sibozaliw.pdf
    • https://cdn.shopify.com/s/files/1/0465/5120/3990/files/mudezitedu.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_off00006371.bin
e9bddaf4cc9e0f65b97505e6e92884357a25bbe98c2b2081402b7c643289c7b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 5244 bytes
font_01_sfnt_off00007564.bin
471eb0a64d31f19b5386cf1f23f52f63a6fe7d47e30f0f88b83057829176b223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 12864 bytes

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