Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e261863b72dc60…

MALICIOUS

PDF

59.4 KB Created: 2020-08-05 17:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab8d53c3802face8a342caef97be6b0f SHA-1: fd964d469c8f2223e0d343a7c2c74e72460d932a SHA-256: 99e261863b72dc607f01b4a99b535c24cd8870aedc20127cbd27bc47af6dab57
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a bible study lesson. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM firings indicate the document's primary purpose is to redirect users to malicious infrastructure. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. The document body, though heavily obfuscated, contains text fragments related to 'discipleship bible study lessons pdf' and the malicious URL, reinforcing the lure.

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=discipleship+bible+study+lessons+pdf
    • http://files.kalliopearts.com/uploads/1/3/1/1/131164398/4c7590a1be9c9.pdf
    • http://jetuke.fairfaxpinesenglishlabradors.com/uploads/1/3/2/3/132302782/3e1b7b.pdf
    • http://files.birdhousepdx.com/uploads/1/3/1/6/131637362/kezozuri_milat_gurejafabobav_sofawarugilo.pdf
    • http://files.birdhousepdx.com/uploads/1/3/1/6/131637362
    • https://cdn.shopify.com/s/files/1/0439/2599/5688/files/39043942372.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/zutunap.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/25593075172.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/elisabeth_badinter_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/vuferisuzirupol.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7520/files/pizifipiwogezumozibafiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/potulebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/effects_of_public_speaking_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1954/files/30106762800.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/31269148438.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/33207470772.pdf
    • https://cdn.shopify.com/s/files/1/0438/3352/4386/files/zapibijodupolonujilejafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/potevulilanaluzigiru.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_off0000abab.bin
14a37853f838eb5f485cf70107b4a9aa2c886856111d6b31081c30aa9e73fa05
pdf-font-stream PDF embedded font (sfnt) at offset 0xABAB 5176 bytes
font_01_sfnt_off0000bd53.bin
574c9c58331697b65be70b024b5891a59426fb3ed17453be4f70c6a2ae68bbcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD53 10316 bytes