Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff591d4b4aa223d0…

MALICIOUS

PDF

58.9 KB Created: 2020-08-11 16:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ec82e7bb8b001269fe59894ef6a705c SHA-1: 2ca5bd31ed8620d8e195196568c6194dfc03aa54 SHA-256: ff591d4b4aa223d04dd3c3918e3eacc9cdd07659e6bf277402a4a1f7201c2f8a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=math+puzzles+and+brain+teasers+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also contains a large number of external links, many hosted on Shopify, indicating a link farm for SEO manipulation or distribution.

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=math+puzzles+and+brain+teasers+pdf In PDF document text
    • http://files.normanconquest1066.org/uploads/1/3/0/7/130776821/buwuv_xodoxadix_rigajefu_dekesovulede.pdfIn PDF document text
    • http://files.rodmanplantation.com/uploads/1/3/1/6/131606563/5ed10910152152.pdfIn PDF document text
    • http://files.createunboxed.com/uploads/1/3/2/7/132712116/tojuwivorat_fovolijumin_nelozopube_gapog.pdfIn PDF document text
    • http://files.emilycoderre.com/uploads/1/3/1/1/131163684/ruriledadezaveg.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/1/0439/8107/8686/files/fitiwojigizexuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/74885838879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/32096567876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/82460703602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/wevujiwopive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/siwelix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/87668824724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/git_diff_particular_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/19497824521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/gimubasuregitelatak.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 5096 bytes
SHA-256: ebcff20b890bf1653e251616ed0b8d1275bcee936915f8bbaf7bdc9152d97a50
font_01_sfnt_off00009d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D03 2752 bytes
SHA-256: cb6f9e6979d319c6b22a9912259d7433abf5c937a06a8f09846aa692f2e586ba
font_02_sfnt_off0000a8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E7 11656 bytes
SHA-256: 7a71b30aa8e6b2065feb5cb19fd722b2a68e021912941a807fd7f5bc8142ae3a
font_03_sfnt_off0000cfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34