Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3cc01e32c09260…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 20:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ce99604c23662cfab3ce2c4153570a SHA-1: d8040ade9b7d7c0d86da1a235cbd3f91da2788b3 SHA-256: ef3cc01e32c092606b0af3ab5deec0c4d69415e02a445bbe17771c22bdd097cf
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body and extracted URLs. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL, 'https://ttraff.cc/pify?keyword=invitation+templates+for+60th+birthday+party', is likely used to redirect users to a malicious site. The document's content is minimal, suggesting its main purpose is to facilitate the click on the malicious 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.cc/pify?keyword=invitation+templates+for+60th+birthday+party
    • http://files.tcawarriorsathletics.com/uploads/1/3/0/7/130775701/livol_wigidebobamo_binenobidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/xubamuwavaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/davukubipenafep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/40559552078.pdf
    • https://cdn.shopify.com/s/files/1/0438/2257/9869/files/6379970367.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/toziteded.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/76785052029.pdf
    • https://cdn.shopify.com/s/files/1/0447/4558/8887/files/90478251523.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/79690604307.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/zupupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/fundamental_of_accounting_principles_20th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/vokixukovebasoriwor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/dibupalezugemizekodurilew.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_off00006ef9.bin
493b84cf4fcc8caa47a9af3a6fe1d09b26d424b38afbd17efed25cd2b5360442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 5816 bytes
font_01_sfnt_off00008299.bin
cded753cb08e3f5ea20ca6e7a2ebef0478c5773d6c5442ecff10dd38bf61cab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8299 10232 bytes

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