Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d93382cc09325d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-12 02:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b998c60fd43b8ea55ad1e7d6b7a10c38 SHA-1: 3bb05a1caaf34e6da8862cbfdcb3db1c5b19b5ba SHA-256: 83d93382cc09325d905e1e7541926bae1d583ee1357e08704675ac9a8aa4ffd1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into downloading further content or visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=narrative%20elements%20worksheet%20pdf In PDF document text
    • http://mesipob.theguitarengineer.co.uk/uploads/1/3/1/3/131398351/mevafimotumoripa.pdfIn PDF document text
    • http://files.borneogynae.com/uploads/1/3/1/8/131856279/2116490.pdfIn PDF document text
    • http://files.moraystore.com/uploads/1/3/0/7/130739616/5950678.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/1/0430/2195/9325/files/54527534328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7347/0618/files/waxafug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/25244342720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/defepoberotoluvonij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/virenipigowifuwenilan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/algebra_worksheets_grade_7_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/2162551378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/99741786636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/populate_form_from_database.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/gokudesipujanurepariwowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.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 2

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_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 5256 bytes
SHA-256: 2eb122ef56f13b0035afe238dc8964627db078471a89179d09afbcd45dab0123
font_01_sfnt_off000073a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A2 10164 bytes
SHA-256: 9944c9b66cdce75a3de2cbabfee10a080e85935230f21ba39fccbdd94239b9d2
font_02_sfnt_off00009655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9655 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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