Malicious PDF — malware analysis report

Static analysis result for SHA-256 44eaa38a3bf90311…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 07:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980228212247ab4bf2d4a2287d05e7f2 SHA-1: 39cf6a02aa34b334be5133b35108dc8e01e4cfc0 SHA-256: 44eaa38a3bf90311148e3d4c37a9572866ce63dd565dbea398cf69e1f18c516d
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body, though heavily obfuscated, contains text referencing 'Counter- strike free 1. 8' and the malicious URL itself, suggesting a social engineering lure. The PDF was flagged by multiple heuristics as a malicious redirector and link farm, indicating a high likelihood of malicious intent.

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=counter-+strike++free+1.+8
    • http://files.meriyaatra.net/uploads/1/3/2/7/132712174/xajitesabuzeko_bawenude_vizuvamutelo.pdf
    • http://files.dblakephotography.co.uk/uploads/1/3/1/4/131406781/2293623.pdf
    • http://pugik.rabamerica.com/uploads/1/3/0/9/130969754/7932471.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/php_latest_image_in_dir.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/adverb_worksheets_for_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/difference_between_memorandum_of_association_and_articles_of_association.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/52093266524.pdf
    • https://cdn.shopify.com/s/files/1/0435/9123/7794/files/dunakuvojuwibotom.pdf
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/zizofujakalukebibebiloz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/biblia_latinoamericana_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/siralozaweb.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/nibinerelosiwaran.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_off000051f6.bin
3630cfb48214a063ce2a3a1a805b9f8cca83ce8a6d721d99ca3488525aa6f846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F6 4796 bytes
font_01_sfnt_off0000626b.bin
8d3e59b99a9900f3bffaab7ce3e09988e0230e48a84466655dc13cafd89104dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 9968 bytes
font_02_sfnt_off000084a2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 4324 bytes

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