Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0d6a388aa78c79…

MALICIOUS

PDF

55.3 KB Created: 2020-08-24 02:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97ecec8bee06cd429fcbcb72ab1eebb2 SHA-1: 62a1705e742b3db1bce764c2d0bbeb2ff1780559 SHA-256: 9d0d6a388aa78c79c4006ffd7b669b366ccbcf1ffc4f5a1a1e2abb6891b4c602
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, ttraff.ru, is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Maths puzzle with answer for class 9' and includes the malicious URL, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=maths+puzzle+with+answer+for+class+9 In PDF document text
    • http://files.discoversafedriving.com/uploads/1/3/1/6/131636654/lefavoviwerod.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/1/0431/5430/9284/files/sakekaxuvaded.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/96003059777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/76144420014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/autocad_tutorial_in_amharic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/gavotte_en_rondeau_guitar_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/iq_test_questions_with_answers_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/kruppel_engel_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/sigma_alpha_pi_scam.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A13 5404 bytes
SHA-256: 92d31a8a6b7adcdc419f9d5b65663d311d4c1a5ccc083d2c494e052ff5550820
font_01_sfnt_off0000ac90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC90 10676 bytes
SHA-256: acba3647b7d141d9071b14dc83b280c9dc5f37444041c1a06dc1a1f1c7f7df2d

Open this report in the interactive analyzer, or submit your own file for analysis.