Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb3ee9ec9aa839b…

MALICIOUS

PDF

40.5 KB Created: 2020-09-11 18:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02bbae8f35b1bfad124defd0d33138fa SHA-1: d0bb9ce9bd8427cb2adaa37e5373ca52d98d1f36 SHA-256: 9eb3ee9ec9aa839bb4e71674d617bc6b720bbe78c414e631bca1b78376a8e03e
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to shopify.com and other domains, designed to appear as legitimate documents. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.cc/wix?keyword=guided+meditation+script+for+sleep, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains references to this URL and other PDF files, reinforcing the link farm tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=guided+meditation+script+for+sleep
    • http://ruvatuje.whfryer.com/uploads/1/3/1/3/131383648/sejek.pdf
    • http://files.movris.com/uploads/1/3/0/8/130813732/7afac121393.pdf
    • http://vesaj.jaztalks.com/uploads/1/3/1/0/131070705/jabazogifo.pdf
    • http://zujojes.a31ep.com/uploads/1/3/1/4/131409090/gazoxarufurenexa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9028/6494/files/anti_mosquito_sound_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/free_cv_illustrator_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/4355424756.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/bitawezafifim.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5055/files/24163179957.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/gujaxefogifididi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/at_t_netbond.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/android_pay_limit_natwest.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/jutetonudevudisurabiton.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_off000061e0.bin
6f0dbd0c1352c627bdf3b46b0ca048c25224e0f03953d452af8c88ea09d1d867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5332 bytes
font_01_sfnt_off000073e7.bin
f9902ec97c7bb7852feb5eb7390f1a80796849b1f7c471e39d0ce689220ea3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 9820 bytes

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