Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bb233e3070711f…

MALICIOUS

PDF

36.9 KB Created: 2020-07-30 21:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aafd15a2439d39d0be45fe61bd0e9bd SHA-1: b81054b401cbb2c76b2cd496569e808bb506aca6 SHA-256: 91bb233e3070711f9986a8bfb9a5f5ba9361d4638e1f27caf0a48d4d2a7fe397
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a lure for an 'Acrobat pdf editor online'. Additionally, a PDF link farm heuristic indicates a large number of embedded links, many hosted on Shopify, likely for SEO manipulation or to distribute further malicious content. The document body is heavily obfuscated and unreadable, but the presence of the malicious redirector and the link farm strongly suggest a phishing or malicious redirection attack.

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=acrobat+pdf+editor+online
    • http://files.baeculture.org/uploads/1/3/0/9/130969681/2725c0a1.pdf
    • http://files.allstateglassshowers.com/uploads/1/3/2/6/132682882/liwov_fojadamitibeb.pdf
    • http://files.nebulafestival.com/uploads/1/3/2/8/132815054/finagenijozijuwake.pdf
    • http://files.guafoislandscience.com/uploads/1/3/0/9/130969600/zugule.pdf
    • http://files.deelishbydeedi.com/uploads/1/3/2/6/132695401/kegosakowajudi_lilevinakez_xegobag.pdf
    • http://files.deelishbydeedi.com/uploads/1/3/2/6/132695401/kegosakowajudi
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/rivovabinagawusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/befozexelupatami.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/51749114734.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jakenetukuzalavat.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/lunefutaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/soxudafetigefotogipokuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/2646/5436/files/47791225424.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/mojalodenufokatipalorigis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/32353437768.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/pisebevixafojibuwe.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_off000055b4.bin
61448b46a3015e815f23bd7d4ecc64b0cdc81fda20f9f69c5ae2f598ca831855
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B4 4888 bytes
font_01_sfnt_off00006652.bin
1d1750ab8c12457203486c93c5c0787137337cbeef9e76f0326676797ff240f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 9512 bytes