Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3643dcbfdb044f6…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 00:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14d303ee4ef4872f8d3d6bfa537f292 SHA-1: 7d355baa32a1e31285793a41f7f3b39baebad88f SHA-256: c3643dcbfdb044f6cd71d4162fa5bb9125e385afc67a9d359ad54fdd241ae8af
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL. This suggests a campaign to drive traffic to malicious infrastructure, potentially for phishing or malware distribution.

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.com/pify?keyword=control+quimico+de+placa+bacteriana+pdf
    • http://bazefim.nchprovideropportunities.com/uploads/1/3/1/0/131070493/cca09354fcac.pdf
    • http://files.twomanwolfpack.org/uploads/1/3/1/4/131453645/cd4d5ee2078.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/battle_royale_novel_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/51669260036.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/mcgraw_hill_connect_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/pdf_annotation_software_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/venilenusexa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/35516156175.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/refogigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8791/files/birds_encyclopedia_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/81518587404.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/coordinate_grid_printable.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/19772042469.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/12311678683.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/54163725795.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/wuron.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/buddenbrooks_thomas_mann.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_off00006955.bin
730337bf136a4fd5334262761fb913fc4f5336dc9024c2fe20bf821c9d8fdf13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 5292 bytes
font_01_sfnt_off00007b2e.bin
1e8f9acb2e39ca36bee1e318b06f1ae92ce576d96317d5c6ff517e5c31565c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2E 10392 bytes

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