Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8096da3564dd95…

MALICIOUS

PDF

55.3 KB Created: 2020-08-14 17:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9fae03496c4123a8dd64077d836337a SHA-1: 7403e6163298213610b37ab9ac953d0510812260 SHA-256: 5b8096da3564dd95a33231302030dd87577e2657118919e0d02ce5cb88624ddd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=caries+risk+assessment+form+for+adults'. The document body, though partially corrupted, suggests a lure related to a 'caries risk assessment form'. The presence of a large number of external links, many pointing to Shopify domains, indicates a link farm or SEO manipulation tactic to distribute malicious content.

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=caries+risk+assessment+form+for+adults
    • http://files.potomacschoolrobotics.org/uploads/1/3/2/6/132681891/kanagub.pdf
    • http://lonimazad.janda.services/uploads/1/3/0/9/130968921/nuzikaribebaj.pdf
    • http://files.pitchperfectevent.com/uploads/1/3/0/7/130740112/delabapif_ketanaxuge_televej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/70481162412.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/nemudepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/temomokitojotad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/pakogobemixakogasidaluv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/74231115115.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/terra_swoop_force.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/wagib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3062/files/zefusunipexoxogodiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/48851899804.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/44429890006.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/93204269060.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/california_physical_science_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/literatura_inca_jorge_basadre.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/lil_jay_10k_mp3.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_off00008bf4.bin
006674973d2519d1c4d104d57e9d16bee889be1cf63f10ec186e56d94fa866a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 5020 bytes
font_01_sfnt_off00009cf2.bin
39e5dd93956f1eb6eb3e72f56f3e2199269ce6451e513f7dff53042f7378ccb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF2 10696 bytes
font_02_sfnt_off0000c188.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC188 4324 bytes

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