Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c206409021e860c…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 06:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7bbefac442450bec9d724ac3e69681 SHA-1: 33e7090a39a0fa2e5f92f084a6cb93c649d85ce4 SHA-256: 6c206409021e860c6e79e2de41c85c512551fcdea0d0971a4e2680ad628b8ef2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links redirects to a known malicious domain, ttraff.com, indicating a malicious intent to lure users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=aromatic+compounds+examples+pdf
    • http://fapakowis.moto-camino.com/uploads/1/3/2/6/132681670/fc9ca0d1d.pdf
    • http://rivexosin.loupendergrast-mathiesonglass.com/uploads/1/3/1/4/131408738/jegusapijamuj.pdf
    • http://files.thomasrupertcharliebeal.com/uploads/1/3/1/4/131438759/cbd5dc0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/kapukirujut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/37897958137.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/fetepiximeluvebujegape.pdf
    • https://cdn.shopify.com/s/files/1/0428/8525/1235/files/venidiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/wijijisumupolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/56979217908.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0314/files/66742015382.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/sovuregedunofima.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/bitesotimeguzapavutureko.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_off00005fa3.bin
95049a16c9616f54478fb8d943fbb8a03f7e010f8d3e5584bf81777986c47a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5360 bytes
font_01_sfnt_off000071c4.bin
9a2136964d96579dace3c6614fe362ef44483ce2435f3c84dd767d1db1d256d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 9980 bytes