Malicious PDF — malware analysis report

Static analysis result for SHA-256 0483b1ad7cf321f4…

MALICIOUS

PDF

46.1 KB Created: 2020-08-19 09:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a30fe5eb8fb915547feca6ac1bdad8e6 SHA-1: 48fe6a3c6c9867a276b251c5367d7b9f8a7a2431 SHA-256: 0483b1ad7cf321f4faf71203dd95a47c86e55ed1c1187ac667b260bbc5400b68
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a campaign to drive traffic to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=ascanio+condivi+pdf
    • http://nabuporor.bouldermama.com/uploads/1/3/1/6/131606140/suguxugukigopi.pdf
    • http://files.nest-of-the-rat-king.com/uploads/1/3/1/4/131454316/6d86c7a657cd168.pdf
    • http://files.ignitepayments-network.com/uploads/1/3/1/4/131411474/6471571d44d642b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/how_to_clear_discord_dms.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/murexirameroxosivud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/34440201470.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/12195542768.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/xisolivukamowudirujujoged.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/lorenemeverimidusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/30452759725.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1185/files/visual_reinforcement_audiometry.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/antigona_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/59664200608.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/geometric_forms_art_lesson.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/adelaide_tv_guide_for_saturday.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/override_checkout_js.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_off00007495.bin
1c759667df00d4b8f4858992eb66650b990ff9ba817812e86394c2f6220377dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 5068 bytes
font_01_sfnt_off000085ea.bin
51855f8d5e97c77582973d948c50494adda5ba76896ea90b60e991a255ac6657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EA 11092 bytes

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