Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cd95a3dfa8389d…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 16:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04cf13718ebbd39ebb5e75f452bf4fe1 SHA-1: 9299731d6f61406422f50197b5962b885ec2c40b SHA-256: d3cd95a3dfa8389d2f5a864e544ff6bf4c3b14f5c275f98da0b074f75dde16a5
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL, https://ttraff.cc/pify?keyword=building+information+modelling+asset+management, is likely used to funnel users to malicious sites. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=building+information+modelling+asset+management
    • http://files.stephaniebershyoga.com/uploads/1/3/1/3/131379371/1049198.pdf
    • http://files.taupobiblechurch.org.nz/uploads/1/3/0/7/130739143/7933594.pdf
    • http://files.milfordgardenersclub.co.uk/uploads/1/3/1/1/131164402/zabumojanerodox_duxewi_kogew.pdf
    • http://files.elwtf.org/uploads/1/3/1/6/131606262/90dd2e.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/siren_song_margaret_atwood_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0462/7736/1824/files/all_assamese_song_website.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/petebobaseg.pdf
    • https://cdn.shopify.com/s/files/1/0454/5445/9030/files/digium_asterisk_gui.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/91428497315.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/93006593465.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/vosorozikubikokeronoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/administrao_pblica_patrimonialista_burocrtica_e_gerencial.pdf
    • https://cdn.shopify.com/s/files/1/0439/2606/1224/files/xefawasopez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9011/files/aptis_vocabulary_test.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_off000065cf.bin
9b8e2a00856640c27b556fcaad2c11f09c76071ca6f4087396e57326bb601a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 5276 bytes
font_01_sfnt_off000077a3.bin
bad19b24b95953471e4e6fa2f139c1fa109bb0ea309698a289934745d27e1930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 10184 bytes

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