Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d694719bfd99f03…

MALICIOUS

PDF

46.7 KB Created: 2020-08-08 19:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b86c1ed59769627b9c73f4e72b97d02 SHA-1: 352e8d100f781840e3a475e59001923358c23bc4 SHA-256: 0d694719bfd99f03342e4866c53ffbf467bf2bccac1d7817212a7e066ef973a3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=epigenetica+livro+pdf. Additionally, the document body contains numerous embedded URLs, many of which point to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link indicate an attempt to direct 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.ru/pify?keyword=epigenetica+livro+pdf
    • http://files.iooftxgreaterhouston.org/uploads/1/3/0/7/130776529/begowenide-risedif-gafazinove-tiradu.pdf
    • http://jagawojat.mouthfulofcakes.com/uploads/1/3/1/6/131606490/4352124.pdf
    • http://files.oceanorganicscafe.com/uploads/1/3/2/3/132302892/wowen.pdf
    • http://files.avraprana.com/uploads/1/3/0/9/130969057/nizigitudifosimobeko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/1-_99_fishing.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/free_editor_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/nipujakub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/bodosowaroboz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5158/0568/files/20420114897.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/11196045826.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/kusadepiridofanol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/nuwevoko.pdf
    • https://cdn.shopify.com/s/files/1/0443/1101/9676/files/gabidebinawarako.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/nemud.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/95108141547.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/rowipak.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/portland_trail_blazers_schedule_2020_18.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acc.bin
5852e4cabb5999d205f5618ecdb8319145f22fcf8e15954d39ec566440f642e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACC 4948 bytes
font_01_sfnt_off00007bb8.bin
d78d5a5922e9dd37281eca7836207c4fcdb0cfa1e7617075b5bc0475e853415d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 10436 bytes
font_02_sfnt_off00009f72.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F72 4324 bytes

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