Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b998070150fe192…

MALICIOUS

PDF

42.1 KB Created: 2020-08-25 17:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f0de7231858fe6436f7b8e8d59010f SHA-1: b62e3067b6b6090c25ad7ba9ab75e0970a2b9304 SHA-256: 4b998070150fe192134283eab76680e6ac3ae8fc12ee41f8375bc65b8b5d809b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many of which are to benign Shopify domains but include unknown and potentially malicious ones. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL and references to 'animax tv app for android', suggesting a lure to a potentially malicious application download or phishing site.

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/pify?keyword=animax+tv+app+for+android
    • http://najolebev.icomppower.com/uploads/1/3/0/9/130969077/45433311ed.pdf
    • http://files.fourlittlecarpenters.com/uploads/1/3/0/7/130740202/nipak-firogasenifez-sezubemarolazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/apollinaire_poems.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/liposodomomawalomib.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/tupovire.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/lubusopijakalixeveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/99345304494.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/how_to_analyse_texts_carter.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/58767155638.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/mipebanisiwibewegomazol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/vewatajolegixegojiruvik.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/potunorapimalokiwidazol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/56906553073.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/importance_of_vehicle_tracking_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/gimeponagalajitumas.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_off000066b2.bin
24f6f5896950b60d40b0fc3e482ceee8c77cdaa3239d9a7608e3cebdf027fc89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B2 5096 bytes
font_01_sfnt_off000077f2.bin
dc653449e3f115995e7c67cd46d5b94fa3325561a18ad7721744f773ac436a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 10512 bytes

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