Malicious PDF — malware analysis report

Static analysis result for SHA-256 74da9c1d3d123c58…

MALICIOUS

PDF

47.3 KB Created: 2020-08-24 14:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1259403615db04c8888a383359f43f21 SHA-1: d5e128657282e7579c20d09b68b0998e7f717277 SHA-256: 74da9c1d3d123c5836d06075211c5742e8ce556bca9c6c083e581dc0aaa4f51b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector link farm. The primary malicious URL, https://ttraff.com/pify?keyword=perforated+sheet+metal+fabrication, is directly linked to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded links are designed to redirect users to potentially harmful 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=perforated+sheet+metal+fabrication
    • http://tewomo.cutekidscrochet.com/uploads/1/3/0/9/130969060/wufoxotijo_tofopujud_barujiwup.pdf
    • http://jikon.behinddallas.com/uploads/1/3/2/3/132303301/benekubizi-wuderixuvut.pdf
    • http://xeneta.adrianbc.org/uploads/1/3/1/3/131380500/gakamigipafe.pdf
    • http://files.zoefriedman.org/uploads/1/3/1/4/131437333/9ac72.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/72730740735.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/ruwimodexunazubadus.pdf
    • https://cdn.shopify.com/s/files/1/0459/1678/2741/files/bannari_amman_padam_video_ing.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/basic_concepts_of_electrical_and_electronics_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/ammonium_formate_ph_in_water.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/43012208766.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/unilever_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/xewato.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/drdo_ceptam_07_notification_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/39156719900.pdf
    • https://cdn.shopify.com/s/files/1/0438/4882/7040/files/26877762056.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa8.bin
171751b186f1d40b533b9e52c490555d21d2f53815f9c3e0c489ddbf75a3f4e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA8 5404 bytes
font_01_sfnt_off00008cda.bin
b33858ea29acc526766c73567e1eadb2f1b1084fbf4d42f9eb3fbc9ebf682394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 10304 bytes

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