Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad5eb3b45b25291…

MALICIOUS

PDF

42.4 KB Created: 2020-08-27 20:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ba7c9194552f0f6b5d4aa41f1376be SHA-1: a8efa90f8dfd7b09cd69f8f54fc6b897698a0a25 SHA-256: 3ad5eb3b45b2529147a3fece01f4e515d999bf02b8c0b7d1afc936a47d674a09
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=la+llegada+online+subtitulada'. This URL is likely part of a phishing or malware distribution chain. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to potentially malicious or unknown domains. The ML classifier strongly flagged this PDF as malicious. The presence of multiple embedded links suggests an attempt to direct the user to external, potentially harmful content.

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.club/pify?keyword=la+llegada+online+subtitulada
    • http://pexisis.behindthebittack.com/uploads/1/3/1/3/131380177/fogajoxunudo.pdf
    • http://jabozej.isis41don.com/uploads/1/3/1/8/131856703/kepegu-sididagusat.pdf
    • http://files.moorehousecreations.com/uploads/1/3/0/9/130969334/4962052.pdf
    • http://jabozej.isis41don
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/classic_albums_metallica.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/journal_of_diabetes_mellitus_type_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/jurarowapavazezogiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/vugiboxijulu.pdf
    • https://cdn.shopify.com/s/files/1/0454/2952/2588/files/biwabonexumodawokufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/35258994775.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/zovexatomomeruvovoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/american_girl_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2949/files/dakimugajadub.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_off000065c5.bin
bc781a4eed1585df7c150e4c2dcfe03ede33ffa98d6e640715b6321d3ecd18ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 4980 bytes
font_01_sfnt_off000076be.bin
ab5637ee57cee329e6e88486bd1459e8e6bc7ad53306eca7bb3bcfd3c4fe196f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 11264 bytes

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