Malicious PDF — malware analysis report

Static analysis result for SHA-256 9108245cfb20d3f0…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 08:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da7d3039dd138fd28a4ae1b222aadc0b SHA-1: ab39a9cc6946e1b1e32ddb24d2bf83682a38e877 SHA-256: 9108245cfb20d3f02d369e866d62f8c7eda12da565f08db6dd171737ffd6eb0d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=euthanasia+bioethics+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the malicious URL is the primary indicator of compromise.

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=euthanasia+bioethics+pdf
    • http://files.coleman4wcsb.com/uploads/1/3/1/1/131164231/lujevupibabide.pdf
    • http://files.buddhacbmr.org/uploads/1/3/1/3/131398406/pojivon_feneloxijaxuruj.pdf
    • http://files.godshealingprocess.com/uploads/1/3/1/3/131398143/eac49e7f97687.pdf
    • http://sabewafa.innercaravan.com/uploads/1/3/1/4/131483027/mozewetoreligot_pilemonelefusar_lodezet_timibalejam.pdf
    • http://riwize.naturesintent.co/uploads/1/3/2/7/132712207/9af49c0de3851c5.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/76740613398.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/tusijadibovufozik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/fegudodefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/bivogosogalubewamonivuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/58528958728.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/wanemalejalitaja.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/mathematics_for_economics_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/wukarenesap.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/37980273887.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/international_airport_codes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/apprendre_le_portugais_rapidement.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_off000062bb.bin
f5e5089131cf6605486fa65c3e6914600fca6dd2dd2d52af5c6a95ef2a7000ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5212 bytes
font_01_sfnt_off00007468.bin
61f17a0887c6e1ef6db56919311d4a300da1bcf6013d87438d92eacf98e966d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 10012 bytes

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