Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d35b73cdb1ff74…

MALICIOUS

PDF

45.8 KB Created: 2020-08-14 06:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 795da87c104d54af4786e3b0a3f0e358 SHA-1: a1a26147956c30f0fa9e9eec7fe9ba262c96a7d2 SHA-256: 43d35b73cdb1ff74769f2a924879d2ca99e1524651b80a6cb51fc5d15c86c2c7
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to a quiz and the redirector URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous links to Shopify-hosted PDFs indicates an attempt to appear legitimate or to distribute further content. No scripts were extracted from this sample.

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/pify?keyword=fun+general+knowledge+quiz+2018+with+answers
    • http://files.amores-project.eu/uploads/1/3/0/9/130969097/pukinuzut.pdf
    • http://kitejas.glitteratibath.com/uploads/1/3/1/3/131398097/ef5a731912580c3.pdf
    • http://kisozerel.mwcatlanta.org/uploads/1/3/1/3/131398003/tapupadaf_tewepukekufanuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/55495358848.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/94053170548.pdf
    • https://cdn.shopify.com/s/files/1/0435/3913/6661/files/acrobat_reader_9._0_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/bufogowusomawug.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/saterejewesafugezorulow.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/nikon_sb_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/marathi_english_barakhadi_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/furupifexenudul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/xuduw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/42062545236.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/eighth_amendment_to_the_constitution_of_pakistan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d1.bin
1ac53a288962084f978b96eb1d32c5a306b0edd5ec4923aafcc0e4fc1e8042c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5776 bytes
font_01_sfnt_off00007787.bin
5d9dfe6647c79ad6fb3f092f0410ee5a806610d1b8553cc22619309ed701ad69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7787 10704 bytes
font_02_sfnt_off00009c1c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1C 4324 bytes

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