Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6dfccf0b1bf2fe…

MALICIOUS

PDF

37.8 KB Created: 2020-08-10 01:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0d2d939aa51b1b3a7016f9a628a3b0c SHA-1: 9b9542b96fbf61b000dc97d4a7043ff8957a5a4d SHA-256: bb6dfccf0b1bf2fea657084e7e50703b8e79f1f247ca7e561e793ebf949d38a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector, identified as a malicious link by heuristics. The document body, though partially garbled, includes the target URL and mentions 'Amazon' and 'textbook', aligning with a credential phishing or malware lure. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm designed to distribute malicious content.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.com/pify?keyword=ancient+civilizations+textbook+6th+grade+prentice+hall+pdf.
  • 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.com/pify?keyword=ancient+civilizations+textbook+6th+grade+prentice+hall+pdf In PDF document text
    • http://files.saedward.com/uploads/1/3/1/4/131438682/xilidex_wogomo_xijidafipuwopuv.pdfIn PDF document text
    • http://files.candleendscottage.com/uploads/1/3/0/8/130813063/b93436cfe03.pdfIn PDF document text
    • http://furepo.miniaturecupcakes.com/uploads/1/3/1/4/131437792/tivizes_zupopiroram_bitigix_rujadajurup.pdfIn PDF document text
    • http://kurilige.jrkgemsandjewelry.com/uploads/1/3/0/8/130873826/pavewafene_wumowudogofa_manow_tisilizip.pdfIn PDF document text
    • http://files.cameoimpressions.com/uploads/1/3/1/4/131482822/seteniv_ganajegemeped_jopagojajum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/ralirifir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9902/0696/files/mebexak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufabolip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/monstrous_compendium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/81257776519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1353/0019/files/59700034616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/baniribubudulasaxame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/48661610355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/wogelinegamegisotup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/20596017491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7982/6584/files/91137342784.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5277 5944 bytes
SHA-256: 7b1b78235fed1ff7483018468744cb731b5b87b954e688cc8e929047008fb016
font_01_sfnt_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 10244 bytes
SHA-256: 2b75097a1775cb381db2a2b89000819748ee8ef4c9eba097df51d5c32da418ef

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