Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d6c5758d4d871f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 15:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783795ced5e5624e06edbc94fcaab109 SHA-1: 26bf1d4f02b9caa4c0406483156474a4d1456056 SHA-256: 91d6c5758d4d871fcb5701d6c8b064bfe0678352f66ac0f6afdbfa97912cecd5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body itself is heavily obfuscated but contains the same malicious URL. The primary attack pattern involves luring the user to click the malicious link, likely leading to a further stage of infection.

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=statistical+methods+for+quality+assurance+pdf
    • http://ripifisaw.haileybrunson.com/uploads/1/3/1/4/131437243/vokexare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/tizazetedodikugizilonul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/93284831602.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/14577823047.pdf
    • https://cdn.shopify.com/s/files/1/0435/0941/6095/files/love_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9970/files/suwedaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/tres_veces_tu_3msc_libro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/technical_analysis_of_stocks_commodities.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/xabatidufemisaxejini.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/71350107530.pdf
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/auriculoterapia_terry_oleson_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.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_off0000706e.bin
d80c8cd662df12ada526267476bb76e2adb921df38c0c5bcd3137542f999b322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5728 bytes
font_01_sfnt_off000083c0.bin
d9bd160ce10108095b6c85c3ad44c2f7212689b25229047a647f5d453bc3d259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C0 10584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.