Malicious PDF — malware analysis report

Static analysis result for SHA-256 6866bf10d596232d…

MALICIOUS

PDF

55.5 KB Created: 2020-07-09 04:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 6383818d76872bc61f8aaa99c6b443da SHA-1: 7867eaf7ff649c70fde2814eb34644fdc7a94c6f SHA-256: 6866bf10d596232d47534e4122eec8386707ef60b8cb85fa102650434f3920c7
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous URLs that redirect to other PDF files. One of the embedded URLs, 'https://ttraff.com/wb?keyword=protein%20expression%20in%20mammalian%20cells%20pdf', is identified as a malicious redirector. The document's structure and the presence of these malicious links suggest an attempt to drive traffic to potentially harmful content, likely for SEO manipulation or to host further malicious payloads.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=protein%20expression%20in%20mammalian%20cells%20pdf In PDF document text
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdfIn PDF document text
    • http://files.unidadepastoral.com/uploads/1/3/1/4/131437351/195585ef.pdfIn PDF document text
    • http://files.pawsacupuncture.com/uploads/1/3/1/3/131379680/xovape.pdfIn PDF document text
    • http://files.txpunk.net/uploads/1/3/0/7/130776578/36e3926afd116.pdfIn PDF document text
    • http://files.yorkshirefreight.com/uploads/1/3/0/8/130874175/8876c671f962c.pdfIn PDF document text
    • http://files.jofreeman.net/uploads/1/3/1/1/131163957/3538255.pdfIn PDF document text
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdfIn PDF document text
    • http://files.cottagefarmstables.com/uploads/1/3/0/8/130874175/zitogosuviguk.pdfIn PDF document text
    • http://files.thewallssager.com/uploads/1/3/0/7/130775846/zofudaxeluzun-vogake.pdfIn PDF document text
    • http://files.samhallsport.com/uploads/1/3/0/7/130740054/903c75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://moxijixo678822952.files.wordpress.com/2020/06/93295944528.pdfIn PDF document text
    • https://woxolit.files.wordpress.com/2020/06/pomobaxidibuvujuwi.pdfIn PDF document text
    • https://wexowugo.files.wordpress.com/2020/06/92091837054.pdfIn PDF document text
    • https://nojurax.files.wordpress.com/2020/06/zobamarisilul.pdfIn PDF document text
    • https://rawosevatati.files.wordpress.com/2020/07/jolonemosif.pdfIn PDF document text
    • https://levejaru304222751.files.wordpress.com/2020/06/45581231562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.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_off00009ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 5160 bytes
SHA-256: 70d255f1d85389544e494d374db3cc27e33f880dd9278616109ea296cf65770e
font_01_sfnt_off0000ac45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC45 10564 bytes
SHA-256: 469574dcb713c5c16f5db31ae9b56c0deafbec6fe1f8d949439bc32ed65391b6