Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7d4e4f18d6b827…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 02:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e97d29e94de53879209cc258d47291 SHA-1: d1eb71ee382280ff1f8c24021be4519bcb5f8222 SHA-256: ce7d4e4f18d6b827b6b1f03076e5b90de3f55b428071a1f77df707904eb3802b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating it is a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=amd+7400m+driver+windows+10'. This URL is presented within the document body, suggesting a lure to download a driver. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, which is flagged as a link farm. The ML classifier strongly supports the malicious nature of this PDF.

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=amd+7400m+driver+windows+10
    • http://zodafa.archirayled.com/uploads/1/3/2/6/132695550/sewizajalodiv.pdf
    • http://zunegeni.cgvideoproductions.com/uploads/1/3/0/9/130969352/36224.pdf
    • http://gedadosep.linetweaker.com/uploads/1/3/2/8/132814930/f1209d493dd74b.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/starboy_album_leak.pdf
    • https://cdn.shopify.com/s/files/1/0440/9150/6840/files/zavet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/lonudamogid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/16155858300.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/17229802229.pdf
    • https://cdn.shopify.com/s/files/1/0448/3710/9917/files/activated_carbon_adsorption_for_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0439/2815/8363/files/sirofuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3795/files/current_affairs_march_2020_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/minecraft_village_finder.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/rubberband_man_ti.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/mikefavorutoliseta.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/kowejeributefopixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/50726280336.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/81865182375.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d63.bin
254f71056b17a62985056be9cf619ae5bee711b5fb947112d09946e6ccc98f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D63 5232 bytes
font_01_sfnt_off00005f41.bin
3868082b32bafa4fad1989665ed0de1d9c21cdd78c69b70fe1e3081a3ec20e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 11492 bytes
font_02_sfnt_off0000848f.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848F 16132 bytes

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