Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec06109fd719dde…

MALICIOUS

PDF

49.7 KB Created: 2020-07-10 19:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 31e23173810af4f8c64b03d9101861e1 SHA-1: 0dcb03c9d5840969257c4ebbbadb20ee68ea487a SHA-256: aec06109fd719dde95d0e4c7301d2387a856eb864de9fef0c36e32e2b529f4df
192 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to redirector infrastructure. The primary link, 'https://ttraff.cc/wb?keyword=aplikasi%20convert%20word%20ke%20pdf%20terbaik', is identified as a malicious redirector. The document body text and embedded links suggest a lure to download a PDF converter, which likely leads to a malicious payload. The presence of numerous SEO-optimized PDF links indicates a potential link farm for SEO poisoning or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=aplikasi%20convert%20word%20ke%20pdf%20terbaik In PDF document text
    • http://files.valleydjservice.com/uploads/1/3/1/4/131407565/2b4e00d713a16f.pdfIn PDF document text
    • http://files.k9searchmidwest.org/uploads/1/3/0/8/130814423/numofopunixudokilejo.pdfIn PDF document text
    • http://files.dmcunite.com/uploads/1/3/1/6/131606321/8808296.pdfIn PDF document text
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdfIn PDF document text
    • http://files.thequestofjz.com/uploads/1/3/1/3/131384599/kizafe_fatumexofoj_dipelolu.pdfIn PDF document text
    • http://files.arefsorientalrugs.com/uploads/1/3/1/3/131398367/juravanizula.pdfIn PDF document text
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdfIn PDF document text
    • http://files.dueweke.net/uploads/1/3/0/9/130969603/89df11636b6.pdfIn PDF document text
    • http://files.sciencevisionre.com/uploads/1/3/1/3/131398605/cb63e071.pdfIn PDF document text
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vizivalafis.files.wordpress.com/2020/06/wozisusanazufetuzafe.pdfIn PDF document text
    • https://tamabofupema.files.wordpress.com/2020/06/raxutigasuloxi.pdfIn PDF document text
    • https://somirazowut.files.wordpress.com/2020/06/kelige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/wufoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/fujometobuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/fozadodozadovenozivez.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_off000084ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EF 5284 bytes
SHA-256: e2b80830f211fdf6a2e0c3bbea8b4a8f75d241e29eccd222bf57f156481f8336
font_01_sfnt_off000096f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F2 10100 bytes
SHA-256: a3add03e1182378f502ce4be9cffc0a31bfe33e8595ee497abb2fb64366c0631