Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff26c34652e95b7…

MALICIOUS

PDF

36.9 KB Created: 2020-08-11 13:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4739e34cd674b358f2ae413532531ea0 SHA-1: a733270b2b1534d420a14c068b7685e7d2ca7abb SHA-256: 3ff26c34652e95b79aa050b7ad3daf2c4684d880119f2664aebf06a150ea8f26
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'anxiety and depression pdf'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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=test+de+zung+ansiedad+y+depresion+pdf
    • http://barura.victoriayoga.co.uk/uploads/1/3/1/8/131871390/3674860.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.tephracurlycoatedretrievers.com/uploads/1/3/0/7/130776511/6419297.pdf
    • http://files.stfranciscentre.net/uploads/1/3/1/3/131379149/fozon.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/changing_to_word_document_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/blouse_cutting_and_stitching_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/93273155587.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/jovafamomimivuge.pdf
    • https://cdn.shopify.com/s/files/1/0441/3512/1048/files/csgo_video_settings.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/british_council_preparation_and_practice_tests_for_ielts_book.pdf
    • https://cdn.shopify.com/s/files/1/0446/9296/3484/files/77461853324.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/jogavudifowimoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/wetivazuwibe.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_off00004fcc.bin
ee462b1e0f949472cf0bdde4988449ae02bfeb245133fea89f4434aeeccd01ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCC 5276 bytes
font_01_sfnt_off000061df.bin
83825b45966681a05c2de5046cb0ad97a601e3462ec5238e6f2d03c34fea8d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 10824 bytes

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