Malicious PDF — malware analysis report

Static analysis result for SHA-256 b323e2d9e5fa6879…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 04:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d297e77749fdfa32e4ce75aa1b23c8f8 SHA-1: 042ca639bbeb056b5e5f941d9f417c5b9d629c37 SHA-256: b323e2d9e5fa6879b685ea46e0e73717bd855bc62ff7d8383f9cd2a26d7e96fb
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for an Android music app. The PDF also contains a large number of links to external PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=aplicativo+para+baixar+musica+android In PDF document text
    • http://files.solanophonerepair.com/uploads/1/3/1/4/131452883/11fb1dad.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/1/0428/2135/3635/files/tafejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/antrenmanlarla_matematik_3_soru_zmleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/alternative_forms_of_tourism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/63284575007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/amount_to_cover_mmc_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/centroids_statics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/bakojekulowanaxidulufuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/57185571456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/jogovuporuteve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6186/9733/files/zulixapulomemekaxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/70500313692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/cambridge_primary_science_5_worksheets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4E 5476 bytes
SHA-256: 53da164091eb8fb7f53dd354bd636ad2fa70a32e0fa518c572664a4a1e48c236
font_01_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 11800 bytes
SHA-256: cb21689c09e622043b498cc85a20220230f7e93fd09fd2150eb84fc5fb35bf09