Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee44a1d53f99b0d…

MALICIOUS

PDF

33.0 KB Created: 2020-09-01 06:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a137e6e534f1be40cfa734159570b4c SHA-1: c905ae3900f688e30087e455b5ee194d5b206919 SHA-256: 0ee44a1d53f99b0dcfdb4124545abdae6e381289f5f3c83b01bce1b5f66e7dbe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious objective. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=boy+hair+style+hd+photo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4891/8426/files/diccionario_bblico_holman.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/dirafemasijag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/75555228479.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/nigiron.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/facebook_messenger_for_mobile_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/kathi_video_songs_hd_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/marriage_anniversary_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/malume_bokosi_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/40659418349.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/23525566709.pdf
    • https://static.usrfiles.com/ugd/74a852_747881040e2840f382c07dd556641158.pdf
    • https://static.usrfiles.com/ugd/ce5d00_89d1d7f8b2294e7d8be08e05cf5da7fd.pdf
    • https://static.usrfiles.com/ugd/b52961_e8a1bd3720834cdaa073d6a4f3d4a994.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbad77c40c464302a7f3396c96280163.pdf
    • https://static.usrfiles.com/ugd/b8c837_62c0611ca66d4988bbad41c61cec1fd7.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/76209657525.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/34005710174.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000488b.bin
6dd762770a62a000d3640adcd85906a67236b7b3962cd6c0c602f6c0c6985011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488B 5200 bytes
font_01_sfnt_off00005a38.bin
e8dc7f7d9f021ae2536633c5edc81716f0ed03afd706649347f7ab0527506567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 8508 bytes

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