Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3af0c9b1ed933f…

MALICIOUS

PDF

33.7 KB Created: 2020-08-22 05:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba790247d3c3c1937a01491b7c833a4a SHA-1: 437940550f3ca9662b02270c34264b54a7a77252 SHA-256: 3a3af0c9b1ed933f52a325fb8128a4b854f8f69069663342a79702198caf9cfe
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com and other domains, suggesting a link farm or redirection strategy. The primary attack pattern involves luring the user to the malicious redirector via the embedded link. No scripts were extracted, limiting the analysis of further stages.

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=2019+tamil+movies++in+hd+isaimini
    • http://tewoj.tworosesphotography.com/uploads/1/3/1/4/131407227/gikuwatakinow.pdf
    • http://tozun.shakeituptheatre.com/uploads/1/3/1/3/131398591/ragukififenezalaxur.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/88087698556.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/dejozajikebadagupadi.pdf
    • https://cdn.shopify.com/s/files/1/0444/1692/5863/files/jiwokafosimuruwape.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/dowava.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/learn_english_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/pegamozaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2457/0792/files/vorirezidamu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/xofof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5789/files/84546757512.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/52724383495.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/xaselo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/dezitugalipepofix.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_off0000479f.bin
4b65866ba345b3582458ea425f2fe1179a3216f91745159febdfda6d8f5ad64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479F 5416 bytes
font_01_sfnt_off000059d9.bin
3af6b50dbedca144786f72a103a64336c108ed93aaeef72e1d838235193cd09c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D9 9456 bytes

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