Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6e3706723566ca…

MALICIOUS

PDF

33.8 KB Created: 2020-09-16 14:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5d805e37c3cb9474be0ab4c1c2b914 SHA-1: cca339a2fe36bf259e21db4cdd87158a7b62e787 SHA-256: 6f6e3706723566ca8a5121055a0fe0e671547dd285d9be91856d3f708db6a5f5
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a movie trailer, which redirects to a malicious infrastructure. This infrastructure hosts a large number of PDFs, suggesting a link farm or SEO poisoning campaign. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points to a phishing or redirection attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.link/wix?keyword=rogue+warfare+2020+trailer
    • http://gexabinov.pre-protein.com/uploads/1/3/0/9/130969761/120f35.pdf
    • http://zexotariv.lornathomasphotography.com/uploads/1/3/2/6/132695543/fawijegalopofodedib.pdf
    • http://gejirote.innerpiecepeace.com/uploads/1/3/0/8/130874210/nemagogizat.pdf
    • http://files.countrysideimplements.com/uploads/1/3/0/7/130738823/fifiraxutu_bipixuz_gazef.pdf
    • http://files.heads-high.com/uploads/1/3/2/6/132681322/dopini.pdf
    • http://files.nepalrvt.org/uploads/1/3/1/6/131606289/9a163d3.pdf
    • http://files.papermagicbook.com/uploads/1/3/2/8/132814136/fedakegetefanel.pdf
    • http://files.suzannejjames.com/uploads/1/3/1/0/131070711/1893969.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/airline_luggage_tag_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5306/files/36466050374.pdf
    • https://cdn.shopify.com/s/files/1/0429/7421/6351/files/8511072307.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/kobijolilaliwa.pdf
    • https://054bb1ca-f808-11ea-a328-fc4dd43d38a6.filesusr.com/ugd/d775a9_bb362e18c25343068c6d1d54df956a04.pdf?index=true
    • https://ea27b9cb-0a47-47a9-bdb6-a1b9b9fbeebc.filesusr.com/ugd/5bb01c_3bb8bc6ec3724cbc811606252f67448a.pdf?index=true
    • https://6eae6c97-94fd-4ac0-8f67-4b45bc8e1c5f.filesusr.com/ugd/7be1cd_06f1a869af4843a381f29ad28f069014.pdf?index=true
    • 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_off0000472c.bin
efa44844d703241c75eccd52c84c51ee0a8bffc2af2f6a37bfb4a313ef8dbc55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x472C 5132 bytes
font_01_sfnt_off000058c7.bin
15fcc4841353ac17a1bf400156ba65aef41e0cb8221447c5b71dac358d68a882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 9904 bytes

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