Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3750959dd459a38…

MALICIOUS

PDF

89.2 KB Created: 2020-08-12 22:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1458ff6695de2912ed05046920cc93ac SHA-1: d9b4acfe9d2795939c3a64a131aef06149f1cb7b SHA-256: a3750959dd459a38dbe774af981fc5f908c98dc89fa1c0a94928b55d520cfca8
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a malicious intent. The document body, though heavily obfuscated, contains text related to a 'CEH certified ethical hacker' exam guide and a URL that appears to be a lure. The presence of a SE_ADVANCE_FEE_SCAM_LURE heuristic further supports the conclusion that this document is designed to defraud the user by promising a prize or service in exchange for an upfront payment.

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=ceh+certified+ethical+hacker+all+in+one+exam+guide+book+pdf
    • http://files.foodwithvega.com/uploads/1/3/0/7/130739621/7126862.pdf
    • http://files.williamjanelle.com/uploads/1/3/2/6/132683328/gepevalazolifa-luxefikateka.pdf
    • http://pubud.hsi-electrical.com/uploads/1/3/1/3/131381464/burisoxaroget.pdf
    • http://files.studiosix.biz/uploads/1/3/2/6/132681164/3e0cf.pdf
    • http://domopalep.blairtherapies.com/uploads/1/3/0/9/130969060/507177.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/linonusifogifazuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/muruxiwulodavatiginisitov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/loxilexedafagadugudiva.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/how_do_you_use_sprites_in_processing.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/48739007007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/mathematics_syllabus_d_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/wamab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/61948836120.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/lagokuw.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_off00011f33.bin
02debc2b58dcf3602e8593e61e0f0c840fa57353b52a8274a0d9908efe8dd19a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 5568 bytes
font_01_sfnt_off000131f2.bin
7c9ae9c74e24525fcfe832c05c3b420b012429f839f8057669d3a9b518593536
pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 11032 bytes