Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0872a8f2432a88…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 07:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26356a11894696030cba5a18c620387 SHA-1: a43e414ea7c493cb7351ca3f3e935a0bd62aafe1 SHA-256: 6f0872a8f2432a88354ef01af50551c7dfb296d78addb94f57b91c2377cb2b68
274 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical link, 'https://ttraff.cc/pify?keyword=toshiba+hard+drive+drivers', is identified as a malicious redirector. The document also exhibits characteristics of a payment redirection lure and a password-protected archive lure, indicating a sophisticated phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.cc/pify?keyword=toshiba+hard+drive+drivers
    • http://files.fireecologyandbiodiversity.com/uploads/1/3/1/4/131437724/diriwilomixenolowolu.pdf
    • http://files.brazilianhairandbeauty.com/uploads/1/3/2/7/132710676/7d7c0aae41.pdf
    • http://files.acerecoverygroup.com/uploads/1/3/1/8/131871778/1374044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/fewiwotumubosaku.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/xivijijosetavuvujed.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/sakubilejevideb.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4194/files/97561806716.pdf
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/70606454151.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/24187300125.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xajubebajodefemun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6041/9989/files/babimugavarekofixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/28723481119.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/bomogobaguxizod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/35855184671.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/gifaxafofogunuririzido.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/muvabonubirukogagugitix.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_off00006cb0.bin
93d777cc53e4514ac762190a0ad88b2e16eaba19e1e9858cca1c76e614678268		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 5028 bytes
font_01_sfnt_off00007dc2.bin
67c0c72fc578fa5e7c7631759518ae648b09dfde899a9f99d2052037c9f580ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC2 10148 bytes

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