Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e04f723c0f977b8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 17:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c8bd32b3bc34906905ca2f79b79d1c1 SHA-1: 53a1fd384f878770c6c68f0c848eb941ffbb6bef SHA-256: 7e04f723c0f977b8402e8b1e2735969e31f5a09d52f8801541138a7e4b783309
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.com/pify?keyword=budget+planner+template+excel+free', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains the same redirector URL and other PDF links.

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=budget+planner+template+excel+free
    • http://files.toxicteez.com/uploads/1/3/2/6/132681144/dd6326e62a9927.pdf
    • http://files.mobilefarmersmarket.org/uploads/1/3/1/8/131856567/1d6d6c89823.pdf
    • http://files.mindfulnesscenteronline.com/uploads/1/3/0/7/130740011/vifimixeruro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/jajed.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/32280543572.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/zawixamugiros.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8688/files/75847587454.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/16079712854.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/jemeleladusaxuvutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/biwaxenezimina.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/24977639532.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/8419210085.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/honey_boo_boo_full_episode.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/daxejerazeniwese.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/refraction_of_light_definition.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_off00006aa2.bin
41bacc0daf111e431af572fe362924f6c3f6e71b2999df67530a44e6c5c457df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 5136 bytes
font_01_sfnt_off00007c01.bin
bfc8bc8e74ea9944a6c1ff7d3ea9a8e4dd32398d6e1e44159316b2d473e2def9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C01 9976 bytes
font_02_sfnt_off00009e25.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E25 4324 bytes

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