Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32b5762ae32c816…

MALICIOUS

PDF

47.8 KB Created: 2020-08-18 21:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e7f0f89d0552e6ee16cabd0eb9a8f81 SHA-1: b91edfe07c35b1caf54e6e029852d6b4593bef26 SHA-256: b32b5762ae32c81684cbf89331f519e3c5458a0cd8461170d33882ea59e4434e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=telugu+devotional+books+pdf+free'. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to a malicious site under the guise of providing free devotional books.

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.ru/pify?keyword=telugu+devotional+books+pdf+free
    • http://gibevevid.pumpernickelpictures.com/uploads/1/3/0/8/130813765/buduzatawexisuxunina.pdf
    • http://dobopi.ditcheatchurch.org/uploads/1/3/1/6/131606289/nawabejerirok_xiverej_zogoworoz_nojuz.pdf
    • http://files.usk9.com/uploads/1/3/0/8/130874257/tuxefuf_wefunipudul_sapepebexilojup.pdf
    • http://files.shopvcboutique.com/uploads/1/3/1/0/131070911/10408c1b.pdf
    • http://rijuwa.frapanella.com/uploads/1/3/1/4/131407711/88b5bc9e.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/98589958150.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/pivimesubudebinetifasoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/81885166045.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/vazenotinatizepemorifafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/42343570707.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/resize_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/browser_detection_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0439/4765/5323/files/36359457109.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/68441361242.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee9.bin
9ca2f20673658ae8a028420ba50a0335fb9bb5a6400ff9121671b38f35575bd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE9 5420 bytes
font_01_sfnt_off00007167.bin
a584cdacc9a391aee83b58d1bbd870595c75856c115a57bdcabdd6c98af6298c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7167 7384 bytes
font_02_sfnt_off0000883b.bin
ca05531b1af498e519b4bf1f21762d02ceda7d069607bd65b1678cc8bf9f7530
pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 12268 bytes