Malicious PDF — malware analysis report

Static analysis result for SHA-256 c276a4e96fd9adf9…

MALICIOUS

PDF

68.8 KB Created: 2020-08-19 21:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9512120d9d07408fe8e1d0628880d04 SHA-1: eea6e93f07825fa25c85271607c1ae2cea5fe2bf SHA-256: c276a4e96fd9adf95532969e07670b84853266471048bf8b9fa361d46771ca11
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to iPhones. The document body, though heavily obfuscated, also contains this URL. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content across multiple domains. The ML classifier 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=best+video+er+for+iphone+8
    • http://files.kb-music.co.uk/uploads/1/3/2/6/132695887/9046199.pdf
    • http://files.blueroomaudio.com/uploads/1/3/1/4/131483153/5230d2a64f4197.pdf
    • http://zularaj.indianawriters.net/uploads/1/3/0/8/130814238/ea2c05c490c.pdf
    • http://files.thedougmargroup.com/uploads/1/3/0/7/130739704/850bbf4e8beb008.pdf
    • http://riwut.mrssiegelsecondgrade.com/uploads/1/3/1/8/131856158/6942278.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/christmas_cello_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/83878268993.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/sitadajasidopuxidekad.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/6832741907.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/nanemuvadiviresu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4917/files/51644569646.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/information_technology_roles_and_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0449/0782/3259/files/35381180058.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/lag_bolt_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/lidasozajare.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/xutavepozabazugidudipunaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/fnaf_sister_location_foxy_guide.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/
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/sitadajasidopuxid

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c27b.bin
b98248bcb86ddc7cd1c6910d07b1a40749ef48250783aa59638951281a010b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC27B 5192 bytes
font_01_sfnt_off0000d428.bin
ce434996e7dc8710b7b84a90f5aec1274165d233da72610fda819f1989007fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 16048 bytes

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