Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68bd7788bbeb5c3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 17:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e84a6739c6db61703d7a2b21e87d4fb SHA-1: f0b289de28e46e7b9b8a941133863d66e40da147 SHA-256: e68bd7788bbeb5c360321d197abad1301235d94dbfb223df4b64016028d35a97
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially corrupted, contains text related to a 'visual cognitive assessment test' and a URL pointing to 'ttraff.com/pify', a known redirector. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=visual+cognitive+assessment+test+pdf
    • http://pamoxado.pghcru.org/uploads/1/3/1/8/131872295/toxoxefidatol.pdf
    • http://files.woodworkerhowardlobb.com/uploads/1/3/2/6/132695749/jituf-ruguvuvuzapotuf.pdf
    • http://niwimixo.dennisportnoy.com/uploads/1/3/0/8/130813747/janepaxilovevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/deliverance_and_spiritual_warfare_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2227/7032/files/95754692612.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/kamala_das_my_story_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/95654545259.pdf
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/demain_c_est_toi_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/bisimimuwebajikareper.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/josizojuzikojuni.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4725/files/53929567020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/mundo_do_budismo_tibetano.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/beera_nange_aziz_azion.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/98636195636.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/64988488929.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/41288370575.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_off000063ab.bin
e4fbef6f8689aaf8938716f94271e58cf3bced9209ed601d5431bf691d63ca93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5404 bytes
font_01_sfnt_off00007608.bin
73571227a8d31c13a10408760e9c3541b6d57d4fe809920de4b64d0cc522e5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 10200 bytes

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