Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c2cd96bedfa479…

MALICIOUS

PDF

58.1 KB Created: 2020-09-15 10:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0c19ac83f07cf2d877410e61bc55c7 SHA-1: 51c715ee0fdd8616f725d15d85f461f0fd2503c7 SHA-256: 35c2cd96bedfa479588669df2c416f4d0f1a42f48878fca1cf5a90b92fc4ba57
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/pify?keyword=gamecube+games+on+wii+usb'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous external PDF links, including one to 'https://cdn.shopify.com/s/files/1/0430/4846/8631/files/7375471139.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a lure to a potentially harmful site.

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.me/pify?keyword=gamecube+games+on+wii+usb
    • http://files.wineracingteam.com/uploads/1/3/2/6/132683251/7936544.pdf
    • http://kufiwewet.mealboxreview.com/uploads/1/3/1/1/131164250/8874692.pdf
    • https://cdn.shopify.com/s/files/1/0430/4846/8631/files/7375471139.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/english_learning_30_days.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/kunadujakejow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/niwusagi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8116/files/poluwilumidodejepebopumak.pdf
    • https://static.usrfiles.com/ugd/4117a9_933c038457484550965e0540e9b80980.pdf
    • https://static.usrfiles.com/ugd/3cb679_47604223ea8b4dacb55a6dbbc6189aee.pdf
    • https://static.usrfiles.com/ugd/9bd8c3_d0bde2259fca407ca3bcd114e1f36115.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6b3.bin
62a0874de897d3225b1cafe5b073655deafb6f636a9b35fc399a8f74885675cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B3 5252 bytes
font_01_sfnt_off0000b89b.bin
45fbc44525a298b067aeee27a73921d4abf97155e9b4f9a1eb445725051a6393		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89B 10192 bytes

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