Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ade2072f186630…

MALICIOUS

PDF

33.2 KB Created: 2020-08-24 09:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b7cd616c13d67f008638d7d82af470 SHA-1: 28033cb6d78c554baefcd20c3bb53c02a9ac9775 SHA-256: 51ade2072f1866305b1762c18ff6d71975bec2d4db77a2913e6640e4fc9aa9ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the embedded links. The primary malicious URL is 'https://ttraff.ru/pify?keyword=badrinath+audio+songs+come', which is likely used to redirect users to malicious content or phishing pages. The presence of numerous Shopify links suggests an attempt to blend malicious links with seemingly benign ones.

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=badrinath+audio+songs+come
    • http://nekono.masonjarstudio.ca/uploads/1/3/1/8/131871592/6300676.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8763/files/free_christmas_music_mix.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5815/files/pepururebujiriladosedimu.pdf
    • https://cdn.shopify.com/s/files/1/0460/0555/1271/files/nanidanafotukesijomowiraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/25279290294.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/21097973426.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/a_level_psychology_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/71034671915.pdf
    • https://cdn.shopify.com/s/files/1/0440/3403/1766/files/89295253104.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/wodoluzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9847/files/arizona_drivers_license_manual.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_off000044ab.bin
cefa09d2f96af98ac7646204bea63140672f6db0b9ac452503e8a2531b7786ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44AB 5372 bytes
font_01_sfnt_off000056b3.bin
d37b2a6bbb078eb87525579335d9f3a2c4cb4cf16eec18bdec16f46e19b7dcc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B3 9920 bytes

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