Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a0e522cf9beda3…

MALICIOUS

PDF

45.5 KB Created: 2020-08-16 23:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: acebceca1e2d9811c3275b2a558f5770 SHA-1: 177d5e22c9994cd2c90bd9a6ba3401a0d529c3eb SHA-256: 98a0e522cf9beda3e44cd3c63c50c0672d7541ce722326af0c976176f1cdcbc6
194 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, primarily through its extensive use of embedded links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the primary links directs to a known malicious redirector service, ttraff.ru. Additionally, the PDF_SEO_LINK_FARM heuristic reveals a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious redirector URL is a high-confidence indicator of malicious intent.

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=antibonding+molecular+orbitals+are+formed+by In PDF document text
    • http://nurizarod.columbapoetry.com/uploads/1/3/2/3/132303382/7155232.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/1/0432/3350/9535/files/vingroup_annual_report_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/rawigowiwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/farajujisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/attention_guitar_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/star_musiq_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/87909417245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/banefixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/principle_of_programming_language_tutorial_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/508_assignment_answer_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/j_aurais_prfr_vivre_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/tratado_de_direito_penal_bitencourt_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/python_interview_questions_for_experienced.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
🗂 Part of campaign: childcaredevgroup.ca 3 samples

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_off0000734f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 5572 bytes
SHA-256: 4a1a8ae9348b2faf6c68bfc1b045d6aea81e62b4cbc92c29bf0ebab63b284423
font_01_sfnt_off00008626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8626 10216 bytes
SHA-256: cf52490f84f601e7fe3cb7d80100c135a3d2ecfc2aba83cff8c6d58188d69c7e

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