Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d6462c6639c42d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 21:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b157afb9bbddb9b5a62facbae928f6e SHA-1: bc0fc8e5c8f21470254a8581ce7654ae551196bf SHA-256: d7d6462c6639c42d30a9231e73f46d8680b0a813186daadc92263b9cafc66c28
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector, ttraff.com, which is known to host malicious content. The document body, though heavily obfuscated, contains the text 'Recommendation letter for phd pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of numerous Shopify-hosted PDF links suggests an attempt to blend malicious content with legitimate-looking resources. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=recommendation+letter+for+phd+pdf
    • http://files.ironpanjapanesekitchen.com/uploads/1/3/2/6/132680986/pelanek.pdf
    • http://tumowowa.fussfreefunerals.com/uploads/1/3/0/9/130969352/1451085.pdf
    • http://files.ucandles.com/uploads/1/3/0/7/130738912/5647acbd515231.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/58615574580.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/beowulf_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/assessment_and_evaluation_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/40342501270.pdf
    • https://cdn.shopify.com/s/files/1/0438/8074/3080/files/beriris.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/nenekozeligidisuxiwud.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/kawasaki_bayou_220_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/wolomenudenefimi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/cuestionario_sevilla_de_calidad_de_vida.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/24565641444.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/english_grammar_for_5th_class.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/14832833782.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fd.bin
4e765cdaa01c8bfc33dd198d1f3d01b302c622025dc219338e1f400b9f97e8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5224 bytes
font_01_sfnt_off00007390.bin
e643fd5baef4e66008a9d1b90dcd781b9270d7bf30ae3b62973a3671fd333130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 10308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.