Malicious PDF — malware analysis report

Static analysis result for SHA-256 5696e6f2a4f2c974…

MALICIOUS

PDF

53.8 KB Created: 2020-08-03 03:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 056d6015b5753c790a2f8e2f5f2c7daf SHA-1: 27ac9b672a737d6eff3aa8ea247ca60c070be6f8 SHA-256: 5696e6f2a4f2c974395ad11ee25ca9c2a1a1694f64f2e808ff40e8b2c1a53a72
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a financial statements document. The PDF also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/pify?keyword=understanding+financial+statements+10th+edition+pdf
    • http://files.elaresources.com/uploads/1/3/1/4/131406800/vakud.pdf
    • http://files.swimbikeruncc.com/uploads/1/3/1/4/131406807/gupofaw.pdf
    • http://files.premierpropertysvc.com/uploads/1/3/1/4/131454733/4125805.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/xerizopaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/71569630937.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/vujeposodaderigolanuveb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/78860043637.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/23600761090.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/dudaromugabubopudulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/bakiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/sumapusasufumorukawarew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/bike_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/88522550581.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/71871931421.pdf
    • https://cdn.shopify.com/s/files/1/0439/4277/2891/files/zewupepemamemukufuv.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_off00009222.bin
f15b9a0b64969631d4dcfb5d181abf16e731d14a2139ed138d698e1395c374b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9222 5752 bytes
font_01_sfnt_off0000a593.bin
dcbc11faa81992db944bec8ef3251647c0694440bd766fd0a4ebe4c108e0d174		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA593 10604 bytes

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