Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dcc87977b74865…

MALICIOUS

PDF

136.9 KB Created: 2020-08-02 23:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1abd8e8be3076ce2a41848367fbed023 SHA-1: 1d0742e55bbbd350104100e8c9de60453d2ff02e SHA-256: d5dcc87977b748655bbf9879ee973f444aa871c05dcd4c4d135958a9667750ac
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=javascript+transpose+array'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirect URL, suggesting it's the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=javascript+transpose+array
    • http://files.noelanipta.org/uploads/1/3/1/4/131453817/mubevaxetasa.pdf
    • http://files.casaesperanzalongmont.org/uploads/1/3/1/4/131436981/nupod.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • http://files.southernmiddlemusic.com/uploads/1/3/2/6/132695932/f457220f3dafb1.pdf
    • http://files.neststylingyourspace.com/uploads/1/3/0/8/130814297/dafifoxogemori.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/muwuzuguxisozu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/18964909455.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/31100389834.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/93150988377.pdf
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/81188805481.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/muroxibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/81647130303.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/75512266249.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/rasewisixe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a685.bin
ebe2343d6884a6d61daa65b468889309f31a0a68da5e13db2ba58bec97dc8640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A685 5044 bytes
font_01_sfnt_off0001b792.bin
e8c831eadfece1cbe7482033418ffd52d06a5a6e542c60bc3497ef61b70d0610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B792 6316 bytes
font_02_sfnt_off0001c716.bin
986edda4713244fd0360c779994cb5781565c5b28aa46fc8ef99d65ceda30204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C716 17680 bytes
font_03_sfnt_off0001fe56.bin
2fbf25d6468cd9594753bb460ed9ddbb3bbcee88d7f8d15dda8e074748652f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE56 16568 bytes

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