Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6b19a48f9f1158…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 21:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9d7b76564ef3c8aed2fc01caf4b3cf SHA-1: 86274ab2d501704d93c3c05d3d0be7779093357a SHA-256: 6d6b19a48f9f1158973bdedaeb9ef3b0a52405fb7a7c2f854d3ac8b902dc50ca
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=ibm+blockchain+supply+chain+pdf'. Additionally, it exhibits a 'SE_SECRET_RECOVERY_LURE' heuristic, indicating it requests sensitive information like private keys or backup codes. The document body, though heavily obfuscated, contains a URL that matches the redirector, suggesting the document's primary purpose is to trick users into clicking malicious links for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ibm+blockchain+supply+chain+pdf
    • http://files.elcmilford.com/uploads/1/3/0/7/130775997/41a90.pdf
    • http://files.merrillicedrags.com/uploads/1/3/0/7/130775398/2167697.pdf
    • http://renufolol.zephyryoganj.com/uploads/1/3/0/7/130738714/zisajuraxowize_jiditupezuxaxuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/58027490905.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/66597008544.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/60243007910.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/space_dandy_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9766/files/luhn_algorithm_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0805/files/germany_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/ruwaborejizukomupuxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/18239982496.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/fenetiwemazun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/57883899100.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/nejirabapavogorazul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/topidusamadimoxemasat.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/64956905769.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677e.bin
4b9a80d8bd08f4ab1e609937416ac61d6cbe56f8eb155bef4b5cf54609ba866c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5544 bytes
font_01_sfnt_off00007a3d.bin
290ece3604f0726270e6214987828fb8fb957b210d8aae56b0cc8c3d8713a29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10584 bytes

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