Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f31968c447ad8c…

MALICIOUS

PDF

38.4 KB Created: 2020-07-11 05:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: def5d2729682ec1106fb48bf2ba782bb SHA-1: 782db578d544666231894f6660a8150d4c98d480 SHA-256: b8f31968c447ad8c3c0918fac2386f898f72967a91b38df89058a179e50f3047
184 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to potentially malicious redirectors and file hosting services. The primary redirector URL is https://ttraff.com/pify?keyword=panduan+belajar+bahasa+mandarin+untuk+pemula+pdf, which is known to lead to malicious infrastructure. The document body itself is largely obfuscated but contains references to the same URLs found in the link farm, reinforcing the malicious intent. No scripts were extracted from this sample.

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/pify?keyword=panduan+belajar+bahasa+mandarin+untuk+pemula+pdf In PDF document text
    • http://files.fijifreshkava.com/uploads/1/3/1/3/131383655/jufidifevuv.pdfIn PDF document text
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.pdfIn PDF document text
    • http://files.prigitalsolutions.com/uploads/1/3/1/0/131071076/577897.pdfIn PDF document text
    • http://files.selkicasarpg.com/uploads/1/3/1/6/131637057/8beeecc57.pdfIn PDF document text
    • http://files.pressurewashingtorrance.com/uploads/1/3/0/8/130814877/8296835.pdfIn PDF document text
    • http://files.labcharter-pto.com/uploads/1/3/1/3/131379434/4b32ad6.pdfIn PDF document text
    • http://files.theprimitivelane.com/uploads/1/3/0/7/130775215/6024049.pdfIn PDF document text
    • http://files.shopnicolesassaman.com/uploads/1/3/0/8/130813762/3471627.pdfIn PDF document text
    • http://files.burtonresources.org/uploads/1/3/0/8/130874019/8273916.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wadarosav408183356.files.wordpress.com/2020/06/talukapevewopal.pdfIn PDF document text
    • https://gonaburezi.files.wordpress.com/2020/07/26526073699.pdfIn PDF document text
    • https://gotexutag798502486.files.wordpress.com/2020/06/14881149711.pdfIn PDF document text
    • https://bozawof.files.wordpress.com/2020/07/20622089621.pdfIn PDF document text
    • https://xuzuxuzadu.files.wordpress.com/2020/07/zijobolofuvikesexibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/dibugenuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/40349055585.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F5 5336 bytes
SHA-256: 7f98bdafb84f060356e33b21a22a51cf3df28b149b9ec5eb4c6e09d0b7c90872
font_01_sfnt_off000069d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 10144 bytes
SHA-256: 4eb408ff44f55f9b7bed617fd3db53ca2c117df7bb708f996f035f398662db62

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