Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce8eea793140785…

MALICIOUS

PDF

45.2 KB Created: 2020-08-15 17:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89482e797290357552cf45a0b859b0e SHA-1: d0c1d26cb5b2d133b596da5a8a3969dc5560d2ba SHA-256: 5ce8eea793140785a051cb9866684dab356a22b174511ac279bec0501209befb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.ru/wb?keyword=causes%20and%20effect%20of%20air%20pollution%20pdf', is identified as a malicious redirector. The document's structure and content suggest it is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious sites.

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.ru/wb?keyword=causes%20and%20effect%20of%20air%20pollution%20pdf
    • http://files.retreatatprairiewind.com/uploads/1/3/1/3/131379118/lujos-fanarejabu-mudiva-lizogij.pdf
    • http://files.mensanapsychology.com/uploads/1/3/1/3/131379321/0f05399dfe.pdf
    • http://files.marniedallan.com/uploads/1/3/2/7/132741709/kawigefajub_lopejazavizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5167/9898/files/7902821261.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/direzop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/50018262621.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/98442868964.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/kunekijeripudabupudapofob.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/49078366362.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/43997141139.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007327.bin
9939e7e0c3fda3b8a3d548d61201208bf65d235f395885bf27c4c553db4dc2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 5052 bytes
font_01_sfnt_off0000845c.bin
6045869b206022e750dd6b4515f79f9ec01082fe7da7d31f6614fcf7a211eafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 10460 bytes

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