Malicious PDF — malware analysis report

Static analysis result for SHA-256 8896e5e6034a7b11…

MALICIOUS

PDF

95.3 KB Created: 2020-08-12 13:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f38e4e00019702daf4972d5fee2e1b8 SHA-1: bb941768ad3e9972318678f156ef102a390c77e8 SHA-256: 8896e5e6034a7b11a81c9d2cd741e1b13a617fa603526369695bf8be80cf7641
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=project+on+bernoulli+s+theorem+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=project+on+bernoulli+s+theorem+pdf
    • http://files.gpgcobra.net/uploads/1/3/1/3/131383434/396446.pdf
    • http://lirofeziv.prefactortech.com/uploads/1/3/0/7/130776647/5116365.pdf
    • http://files.adultdaycenter.org/uploads/1/3/1/1/131163879/3329193.pdf
    • http://files.tattnall4h.org/uploads/1/3/0/8/130813427/dugizunejubatik_jabupewiduxes.pdf
    • http://files.agelessfitsb.com/uploads/1/3/1/4/131437941/ximiginajopaji-tidizaxor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/pathologie_de_l_appareil_gnital_masculin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7021/6597/files/64137546112.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/solona_hot_tub.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/31995327637.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/77272088522.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/nilajoduguvitavovufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5625/9491/files/gowuxasudomivuzoxamelim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/kevaxawupodefav.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/zoduzowudiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/66364387483.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011617.bin
8bbbd80b95a4ecbe7e30be43e7254b33c048670a6954793ac4b98aa777a1d89c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11617 5400 bytes
font_01_sfnt_off00012843.bin
8573dcfe6ad81356f62d1ee7d5fb56307011ec569f8e2c487335e9d2a19bab29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12843 15960 bytes
font_02_sfnt_off00015aa4.bin
a6084831d910e190a3d08f96e5f78455ba45c8295a05a389334638e59bed44cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA4 16108 bytes

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