Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d82c8df74b9792…

MALICIOUS

PDF

45.4 KB Created: 2020-08-24 15:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3baa87e470478be03da8e5e19eefd6f SHA-1: e076b15b1417b555a07e68382d4c0bb182fd4ae7 SHA-256: 19d82c8df74b97928eeca5e20d55b813f1147b17017fa67f54db6a142fceabde
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content across multiple sites. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=good+earth+chai+tea+nutritional+information
    • http://jigagor.phoneangelrepair.com/uploads/1/3/0/7/130776445/seneminom_bafiluxunuw_jovemejunulebe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/sudujudonazabodipigow.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/tomaged.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/11268997580.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/gudevupusubanebat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/quaternary_protein_structure.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/56005423022.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/demenesojudo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1663/1973/files/83068613858.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/lonozopuromavakukorek.pdf
    • https://cdn.shopify.com/s/files/1/0457/0074/3324/files/billboard_music_awards_2012_performances.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/sesuvizuxolimilisekitin.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_off00007177.bin
e628b10df51034135c6722384b70f700d8d0e260a038e935500d6d2a54bca5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7177 5116 bytes
font_01_sfnt_off000082b6.bin
59109f261c068d29cd61f418dee24052d24f10639109f13b85a2780b119558a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 11764 bytes

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