Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbac52e5841574d9…

MALICIOUS

PDF

38.7 KB Created: 2020-08-18 18:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9376b68e3d34867c795fba859142f0b6 SHA-1: 238c653352dba56c1c3479c5c923d2bfb7ca25f9 SHA-256: dbac52e5841574d95973e8d15aee5b6ce208d966e7e33ec3611b0df12d29c475
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body also contains the same URL, presented as an English language test, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, including a suspicious one hosted on 'xokesix.cappyphalen.com'. No scripts were extracted, but the primary attack vector appears to be 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=english+language+test+online+with+answers
    • http://xokesix.cappyphalen.com/uploads/1/3/1/4/131453194/sozupisulegonog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/10798504626.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9515/files/36569365121.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/73509220304.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/52218669438.pdf
    • https://cdn.shopify.com/s/files/1/0438/2628/2658/files/heart_shaped_box_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/christening_invite_wording_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/bible_verses_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/radio_anatomie_du_pied.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/jepitaw.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_off00005a63.bin
dd8d9f73baf674419248046074d9781c5c517011d715f42afed727310dfc7b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A63 4996 bytes
font_01_sfnt_off00006b6c.bin
e0a598bfe18eb97974ccac8667da3fb8a8ae8d20bcf0dd0950b1b8a6f8867d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 10144 bytes

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