Malicious PDF — malware analysis report

Static analysis result for SHA-256 d928283e21b0e7fa…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 01:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c80843053e9f03c83cdbdbefa4184a SHA-1: 0fb0681dc8a118b13510dec348370c8ee6682151 SHA-256: d928283e21b0e7fa72f66cc46328e85ebe0d90a4abbfa341d19e5f4d9785b9b8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to 'arduino mega 2560 r3 datasheet pdf', suggesting a lure to disguise the malicious link as a technical document.

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=arduino+mega+2560+r3+datasheet+pdf
    • http://files.soulspeakmarketing.com/uploads/1/3/1/3/131398591/devufarawob.pdf
    • http://zuduza.nwscale.org/uploads/1/3/1/3/131383483/954734.pdf
    • http://files.arkansasyouthconference.org/uploads/1/3/1/6/131637919/6364220.pdf
    • http://files.magdalenahoffmann.org/uploads/1/3/1/6/131637136/31d61a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/mezipojomudazeto.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/pevatabovizosefewerir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/xomojuwuvug.pdf
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/phrases_idioms_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/negative_exponents_worksheet_kuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1913/files/beranipewolijosovog.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/7798131313.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/salesforce_crm_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/ralakatika.pdf
    • https://cdn.shopify.com/s/files/1/0430/0836/0611/files/bilingualism_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/symbolic_interaction_theory_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.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_off00006655.bin
d0bdd4cce2e86e04e7648de130906f8ba9a7a90c1e89b23094a6c97fa737dfd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6655 6128 bytes
font_01_sfnt_off00007af6.bin
c4abf346dd84d0ee133bf40d238056a669cb2366d453ec54f6a0c082e7b424f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF6 10356 bytes