Malicious PDF — malware analysis report

Static analysis result for SHA-256 07816b67fcc02787…

MALICIOUS

PDF

43.7 KB Created: 2020-08-10 23:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde20c6834a37e329bf9f8b562da570f SHA-1: 07c07126250dedd1fdd46eb2a79e893bdc9e1bf4 SHA-256: 07816b67fcc0278796193136d2e56b7817dc71c6dd1981ca5a2541942a18dc83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One of the primary links, 'https://ttraff.com/pify?keyword=kyocera+cutting+tools+catalog+pdf', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites, potentially for phishing or malware distribution.

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=kyocera+cutting+tools+catalog+pdf
    • http://files.knife-place.com/uploads/1/3/2/8/132815207/sexukedomini-towub-zutadaxiweb.pdf
    • http://files.thewholechildmatters.com/uploads/1/3/1/3/131383657/6325289.pdf
    • http://pujogewed.annshoemaker.com/uploads/1/3/0/7/130775403/dfe45906284db0.pdf
    • http://files.ggsbbq.com/uploads/1/3/0/7/130775402/jenamavolebusematu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/5680965032.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/61742132603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/wesavi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/jidaxogofofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/36512932089.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/76209997676.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/dawifexedolemem.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_off00006d0b.bin
3cf852bdbca796dcbb0248d6e902b7323477c8f331fa7a7d1304aba7c649f670
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 5396 bytes
font_01_sfnt_off00007f7c.bin
ea864dacbeba36e3e624a2391d8f60719702798fd280d39c3e1e745253fcf4f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10056 bytes