Malicious PDF — malware analysis report

Static analysis result for SHA-256 7306efb656d21f72…

MALICIOUS

PDF

43.8 KB Created: 2020-07-31 15:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3246af10870485d007dd8bded72f0ce2 SHA-1: 1aeea31080c7e60c3c4986f25f781bd4a552ff8e SHA-256: 7306efb656d21f726a1efb58ea4704aa51bff0d3b42bdda255eb75c898a5a80d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.com. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is part of a malicious campaign, likely a phishing or redirection scheme.

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=react+link+to+another+page
    • http://files.pinnerplayers.com/uploads/1/3/0/8/130874205/xodubuwisi.pdf
    • http://files.jujuic.com/uploads/1/3/1/8/131856664/wusibogav-sivexaber-vabijobafaso.pdf
    • http://files.robyntillman.com/uploads/1/3/1/0/131070754/sepupapudi_foxubebarale_degiv_letapik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/16488566976.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/61377888344.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/jagemimif.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/28892142607.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/76172575542.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/kadomigodixuvojok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/finimusomepabisesaketun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/17865223200.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/98093587675.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/27970275057.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/magelo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/79605724459.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/66149942701.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/soxivasinapogadizeze.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_off00006c4a.bin
a67f6c431a037febcf446104d80ab199161b461b9ef2a82e683f1749419841e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 4876 bytes
font_01_sfnt_off00007ccf.bin
b5d5b507e3564952f7c9dc4c73677fbdddf78792c38d6cbdaae1dd28f9ae3e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCF 10884 bytes

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