Malicious PDF — malware analysis report

Static analysis result for SHA-256 59232b7921a345d2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 11:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9ab886ab2890eea01adc1c8bd7db77b SHA-1: b1180e321026f3113a8be15961482026e93e903c SHA-256: 59232b7921a345d2244a6a237827588e4b8147327cd7587bf745440d69bc22a5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to Shopify domains, forming a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains references to the 'labor day history pdf' keyword and the malicious URL, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.ru/wb?keyword=labor%20day%20history%20pdf
    • http://files.claystories.com.au/uploads/1/3/0/7/130738852/morafesiva-mesokuzafeja-lezukuruvalozi-begiferatiw.pdf
    • http://files.gladwinharrisoncatholic.com/uploads/1/3/2/3/132303024/dokiziwazibegaridup.pdf
    • http://nazoma.deborahrios.com/uploads/1/3/1/4/131482975/3053925.pdf
    • http://wexokeju.samniquekahalsey.com/uploads/1/3/1/3/131383791/782125.pdf
    • http://files.ctsservices.com/uploads/1/3/1/3/131381900/0dbc44960f.pdf
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/zobikifawefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/jowutakodijuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/wupop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/depenugagukanalopizevikov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/zajiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/ravojo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1373/files/47082066681.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/nilupuzabimuve.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/47481863874.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/61912002478.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/back_pain_exercises_download.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_off00006aec.bin
cdaf2f68fb45a2066b333239be8af33f73690f3db7fddc1f2c8fee51a383a0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 5280 bytes
font_01_sfnt_off00007cdd.bin
08c09a290639a2892fc7d02d276c83fcff642ce5bf008c9226c294bbf8b13354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDD 11312 bytes

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