Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb90e85e0226a5e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 00:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a5f0cb4f790decd33f46b7f4e5a4336 SHA-1: fff1f225108c05ef944205d1a6dbac504962e091 SHA-256: 6fb90e85e0226a5e5f2042aab72e7bb0e250b03643bb9994064f643dac1ea80d
154 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at "https://ttraff.cc/pify?keyword=consignment+inventory+report+sap". The document body, though heavily obfuscated, also contains this URL, indicating its primary purpose is to redirect users to malicious content. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

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=consignment+inventory+report+sap
    • http://files.mrsmccschooldays.com/uploads/1/3/1/8/131871424/guvinajavipi.pdf
    • http://files.helpabee.org/uploads/1/3/0/8/130874379/0f2018ed5091a.pdf
    • http://files.rcmissouri.com/uploads/1/3/2/6/132695732/komumetijote.pdf
    • http://files.mastersextoys.com/uploads/1/3/0/8/130873930/lopegumefilatul_pavabil_vozatetaxa_ribuxeve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/lolosonise.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/musizalonixabo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/ruxuneluviwezixadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/vogakuvimim.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/cv_templates_doc_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/44990205293.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/zomuminudujove.pdf
    • https://cdn.shopify.com/s/files/1/0435/3795/7023/files/logonukavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/83327606156.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/15305658277.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/64507082231.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/sevoxeruwevovikaluwuxek.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_off00005f83.bin
12fac14e029411ab19d5d97810ab464bc81e17db2ca442cd5a3992e116b9f052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5172 bytes
font_01_sfnt_off0000710a.bin
b547c5f8460d74f629b8455b9df72b130dc46c2317340ce3c2739df2202a15f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 10424 bytes

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