Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8ed38d67a6450d…

MALICIOUS

PDF

67.1 KB Created: 2020-08-10 06:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4db2dc119274a2e1af46bb33ac8e1a08 SHA-1: 725ed492a70c3efb22a9fdb325503c11cfd18b94 SHA-256: cb8ed38d67a6450d35aee8e4c110ddfc53d6edba9baff6b45cb519b77d2ad03f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=contoh+obat+analgetik+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=contoh+obat+analgetik+pdf In PDF document text
    • http://files.thebeatlestour.net/uploads/1/3/1/3/131380297/vepuwegitiw-bipigelabatoba.pdfIn PDF document text
    • http://jotajen.kairostt.org/uploads/1/3/1/8/131871721/gazatas.pdfIn PDF document text
    • http://files.goldenreiki.co.nz/uploads/1/3/2/6/132683154/faf2ecd93ef.pdfIn PDF document text
    • http://files.emilyallredphotography.com/uploads/1/3/2/7/132740595/c41fc.pdfIn PDF document text
    • http://files.fionarimmer.co.uk/uploads/1/3/0/7/130775701/wavijozub-senudax.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/1/0431/0564/8801/files/gipexujuwulet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/19240877318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/xewukim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/13748096840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/learn_korean_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/hallelujah_chorus_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/13722459508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8848/files/tabewoguworelatulufeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/livro_after_5_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/telikakeriwavemowo.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 6

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_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5140 bytes
SHA-256: 8c9fb946c85e44afa0727e91f4910475ffbf36bcf627e6727bae9c21cd8ccccd
font_01_sfnt_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10472 bytes
SHA-256: 061feac09a543995208c586c85bb3653ad40c933f0d2e87a4072dd50a0824bb4

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