Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48fddc621520b72…

MALICIOUS

PDF

39.7 KB Created: 2020-08-08 22:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42cabfb921066d1b21d990e1017d9e2 SHA-1: bb40fdcc8edefa11738a1aac119d1f3b0ac202af SHA-256: e48fddc621520b7278b9bc649154b4681e14b34cc3d3aa958330ceda2f892da1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or phishing lure designed to redirect users to malicious content.

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=caravan+palace+lone+digger+piano+pdf
    • http://files.superherounfolding.online/uploads/1/3/1/6/131636855/gusuza.pdf
    • http://files.robynanneburgess.com/uploads/1/3/1/3/131383384/sumosegimes.pdf
    • http://raped.forestbrookstudios.com/uploads/1/3/1/3/131383314/pugevigefisuduzaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/venepogezeluveni.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/xukezidinalam.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/xojozegiwazafazetun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/tewazifav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8734/7364/files/ribosibigoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/petawesabitorixopuloj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/gemuvonefovafom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/66294103425.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lujozesasevenularinot.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/30349741108.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/27763792514.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/xonasejotirib.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_off00005223.bin
9fa7e497a4be373be777db92bd7d1a472f33cc78029064c39a4bcb8a57a91f1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5223 5112 bytes
font_01_sfnt_off000063a1.bin
8e330d9346d22cf24126ed25e9d295339c5a395bb950761f068b29f6d52e42f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 14748 bytes