Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f1767622f3e768…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 19:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a7d60200c3eb6e7eb48f375952e3bfc SHA-1: 0a0af95e00d144d6cacd6c6eb8d56cab601759d5 SHA-256: 84f1767622f3e7689fde9aff3a1a5a1061e4d2347eee21d3f59bc573f2939b67
202 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, masquerading as a tool to reduce PDF file size. The primary link, 'https://ttraff.cc/wb?keyword=reduce%20pdf%20size%20online%20free%20in%20kb', is identified as a malicious redirector. This suggests the document is part of a phishing campaign designed to lead users to malicious websites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent.

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.
  • 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.
  • 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=reduce%20pdf%20size%20online%20free%20in%20kb In PDF document text
    • http://files.manzanitaspreschool.org/uploads/1/3/0/7/130776673/pimudavisafamipawopa.pdfIn PDF document text
    • http://files.mylgtg.com/uploads/1/3/1/6/131607467/zetaruwunetopasus.pdfIn PDF document text
    • http://files.channingbenjamin.com/uploads/1/3/1/8/131871558/virepinutes.pdfIn PDF document text
    • http://files.didactic-engineering.com/uploads/1/3/1/4/131438002/rinusula_pilizuwar_pusanezesoni.pdfIn PDF document text
    • http://files.thewisdenartist.com/uploads/1/3/1/8/131871593/2e7a538.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/1/0428/7964/7900/files/66662191922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/69389810833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/61830870882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/zegebiwowudefasukeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/91866651618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/50697784180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/3862459330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/napuzamotaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/mazirixamuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/tirexofolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6996/4439/files/fusolibogedan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/sidimewedubevud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000562e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562E 5004 bytes
SHA-256: 8bf20b9963d8bd57bd61ab52d2c8b409fb146922112a75f592c39abe8c1a506e
font_01_sfnt_off00006739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 10208 bytes
SHA-256: 0fe9d874be9ab4473333bd32259ec53f725a29afdacbe2ab1be4fb124f362d45
font_02_sfnt_off00008a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361