Malicious PDF — malware analysis report

Static analysis result for SHA-256 10312ba246ad3237…

MALICIOUS

PDF

46.2 KB Created: 2020-08-09 00:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 358254b9d269129fdd8cc67da7a8f76a SHA-1: 153feca5788d4b5302740818a46eaaabe8a1a290 SHA-256: 10312ba246ad3237027045d290950ca7c55b68970e2152b0236c3a2eeea7e0a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=oxalate+rich+foods+pdf, which likely serves as a lure to distribute further malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other PDF links suggests a link farm or a method to obscure the true destination.

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=oxalate+rich+foods+pdf
    • http://files.iconnectup.net/uploads/1/3/1/6/131637362/6670125.pdf
    • http://wixosuku.philstarkeyphotography.co.uk/uploads/1/3/1/4/131407227/5739004.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://files.employeetimeclocks.net/uploads/1/3/0/9/130969763/08d1f807.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/papep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/14991581088.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/57535408062.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/7330669159.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/gale_shapley_algorithm_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/responsive_media_queries_for_all_devices.pdf
    • https://cdn.shopify.com/s/files/1/0432/8262/8766/files/xupar.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/mazetajafaduvapudisul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/17145078731.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/ectomorph_training_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006985.bin
9a16d43ac31c6190604b4c4802b4951ccfc24fc1eb568cf29d83227718e59b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6985 5020 bytes
font_01_sfnt_off00007ab1.bin
1d3e739019173862b7a3996a9a92d3bea6e86267da8bfba423e33330ede10c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 10488 bytes
font_02_sfnt_off00009e01.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E01 4324 bytes

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