Malicious PDF — malware analysis report

Static analysis result for SHA-256 9086da4acb671283…

MALICIOUS

PDF

72.4 KB Created: 2020-08-02 00:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99ada49c8c31ac2f9f3c55eec9fd82c5 SHA-1: 7a3f375b88cfb01fc4c5d8b5772a21994e211632 SHA-256: 9086da4acb6712830e175b09b227e1694fefb6c6c6db43b10c47186bcc4d1814
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=gavin+arvizo+now'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://cdn.shopify.com/s/files/1/0432/7584/5792/files/12713668820.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the malicious URL, suggesting a phishing or scam attempt.

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.com/pify?keyword=gavin+arvizo+now
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdf
    • http://files.lowfee401k.com/uploads/1/3/1/3/131384301/surezag-kagiguda-tipitapiloluf-xisex.pdf
    • http://files.ctbgbaskets.com/uploads/1/3/1/3/131380440/956182.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/12713668820.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/sapotejevifitasawuwixoxub.pdf
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/93079723823.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/nvm_install_node_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/88867529054.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/bafojumuxojepagijoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xeniwepisovera.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/15273325945.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/78866483233.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/5580397310.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/27721569060.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/lovuxuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.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_off0000e11c.bin
d121014f90fb255dc8ae797b09c41c70c9c9d53df8c1adc0a26b39d02f889b39
pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 4700 bytes
font_01_sfnt_off0000f147.bin
4db6b7068d21c314181831d32825de62ce225886657f125af65eb53f854abb21
pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 10316 bytes