Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b13b4d64b2d409f…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 21:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da3cb7725f219aaf13d59883e61f372b SHA-1: 090374201e0fae10683790c7cf1090777cc5ddba SHA-256: 8b13b4d64b2d409fc6ec765677641736426500a9ae91ad035bd3f9b8b363641f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body and embedded links suggest an SEO poisoning attempt, likely to lure users to a malicious site. The primary malicious URL identified is https://ttraff.cc/wb?keyword=zbook%2015u%20g6%20manual, which is part of a redirector chain. No scripts were extracted, limiting the analysis of further execution steps.

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.cc/wb?keyword=zbook%2015u%20g6%20manual In PDF document text
    • http://files.triplea-solutions.com/uploads/1/3/2/6/132681392/dibowakesuvatimo.pdfIn PDF document text
    • http://files.chestermolly.com/uploads/1/3/1/6/131606069/nineb-xevotise-mixila-jiwememanan.pdfIn PDF document text
    • http://ranud.geoffreyprwallace.com/uploads/1/3/0/8/130814788/6a949ffcb58b5f7.pdfIn PDF document text
    • http://saloni.molliebing.com/uploads/1/3/0/8/130874359/sesiburim-raninu-kagajinivo-guduripolezebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/paxuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/bas_rona_mat_whatsapp_status.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/15889539534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/blocked_matrix_multiplication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/bls_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/oxford_bookworms_club_bronze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/59744652469.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1F 4856 bytes
SHA-256: 71d46f550eaa55a369e645a3a31c1f4c46c7debca24f45b3721dabe9ea74e5a9
font_01_sfnt_off00005c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C95 14968 bytes
SHA-256: 5e338120aefa7e8c7a9714c81f9586742b1ef6cab04d5decc12ead8754024839
font_02_sfnt_off00008aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEE 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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