Malicious PDF — malware analysis report

Static analysis result for SHA-256 754d7abdc5067af6…

MALICIOUS

PDF

48.5 KB Created: 2020-08-01 16:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37fe68b5520c7547b29d8a07b1e52f9 SHA-1: 25b59bff9c8850fade70e2efcf1ec4b3b59720c2 SHA-256: 754d7abdc5067af66866d9da69596d452f95e04df3f006ad73fe7039d8ac9842
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 pointing to Shopify domains hosting other PDFs, indicative of a link farm. One critical heuristic identified a redirector link to 'ttraff.cc', suggesting a malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the redirector indicate an attempt to drive traffic to potentially malicious or SEO-manipulated 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.cc/pify?keyword=ffxiv+placard+macro
    • http://files.greektheatro.org/uploads/1/3/0/7/130739069/rubifanukapewesogu.pdf
    • http://files.moonman-pictures.com/uploads/1/3/0/8/130813577/kelogutug.pdf
    • http://files.doylearteducation.com/uploads/1/3/1/4/131454238/2741375bdbee24.pdf
    • http://files.golf-in-sa.com/uploads/1/3/2/7/132712325/penebil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/pamigiduza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/nanijozeja.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/xatuzuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/zafokebewazokawobowuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/halo_full_game_download_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/mulivog.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/59046476187.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/98725238223.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/87711760872.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/35287592417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/gaweta.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f52.bin
3552dd0bb343fce730836a5a5200a0df1cac7b7b9785414cb4a7ac625bd58b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 5208 bytes
font_01_sfnt_off000070fa.bin
c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 1796 bytes
font_02_sfnt_off00007985.bin
84b52a634f304a2ad2fb4398ce8cc8ba4cfe6285a69a8d6a1778089e99756750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 10736 bytes
font_03_sfnt_off00009e51.bin
451a97a76e1cd188b335db18aa59b090969584b10ed985ec5dcca0b5cdb1d7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E51 16660 bytes

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