Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07301c0b77d49eb…

MALICIOUS

PDF

50.6 KB Created: 2020-09-03 04:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028b7934a401ec6504f77d795b2b81f0 SHA-1: d8948b8fdcd102f4bd720142189a45871ed734c0 SHA-256: d07301c0b77d49eb3b9ea0678892190393a92f691419464015359aadd6071c10
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are to benign Shopify URLs, but one critical link points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'company letterhead template free' and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=company+letterhead+template+free
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/machine_learning_cheat_sheet_sas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/wake_up_put_on_a_little_makeup.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/gauge_pressure_and_absolute_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4686/files/wapaxividib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/97053948172.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/camaro_ss_2010_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/james_river_va_croaker_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/14198727357.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/23481307914.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/pesepivato.pdf
    • https://static.usrfiles.com/ugd/136d07_ddfadf9102bc434898d366fcba5436e1.pdf
    • https://static.usrfiles.com/ugd/1decf9_a9e791259e6843db8792c6eecb887763.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_85298136c0b94904b8d8a981412aa808.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_2a9982e0c2fa4584b7b06a0151f6059c.pdf
    • https://static.usrfiles.com/ugd/e643da_546454d9f00d4b0ebdfa6816599cf5ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cae11349c0f48c1aa905d019fc1a3b5.pdf
    • https://static.usrfiles.com/ugd/50de67_2a69926cffba42fea57514558abfebf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef293696e40146b081cc655ead63f4dd.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_off0000891a.bin
5e51b796dd9db4f0213f4bc205d8414f4cb55c4d57d7e623e8270f44ac38a239
pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 5112 bytes
font_01_sfnt_off00009a55.bin
973bda431754d697a7680166382029a2cb26ebdfcad764b035c20c9d1a72b52a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A55 10384 bytes