Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b23a33264054b4f…

MALICIOUS

PDF

63.9 KB Created: 2020-08-13 23:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df375ed7e34c1ce7e07c891822f2f9fe SHA-1: 3634bf15df98f4418df9fe6d1d25c443ce580c4f SHA-256: 2b23a33264054b4fdeb0d63dedfd976a17a35545bb824ca665dfb87920fd8695
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, suggesting the document's primary purpose is to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=charlie+puth+song++attention
    • http://dibunij.clarityfromwithin.net/uploads/1/3/1/3/131398091/tetosodujigudur.pdf
    • http://files.nnhst2.org/uploads/1/3/1/3/131379612/lufuxofuwusuwufaposi.pdf
    • http://files.befreecounselling.com/uploads/1/3/1/4/131452938/9a29f7.pdf
    • http://files.lsuhealthsciences.com/uploads/1/3/1/4/131409909/26dadb2eb5.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/8968860351.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/bugusijolavisoku.pdf
    • https://cdn.shopify.com/s/files/1/0438/7287/8747/files/folizixogod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/67231904745.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0146/files/lizetewewopatujil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/sefazupakajokuzilezeraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/93075334450.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/zaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/against_method_paul_feyerabend.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/71506010707.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/wevatowuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/97315594965.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_off00008f53.bin
4aa0e01aed3cf1d1b1a80519b037c259fc432407ec162a35a592d2742fc3e560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F53 3184 bytes
font_01_sfnt_off00009ac4.bin
7e14398526f5ec31cd8cdeeba5696f4dba8cb68119e48d49738be79a2f053032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC4 4988 bytes
font_02_sfnt_off0000abb0.bin
aedd343ee7abdc432114ca5527b024d6cf350d2e93c514e87b48cf0092148274		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB0 16000 bytes
font_03_sfnt_off0000dcf6.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 16120 bytes

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