Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af141ef55fd1e74…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 06:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5627821aef0d35969bcbcf80a053ab0 SHA-1: eeb6ee37fb9917e8bd305f4cf9116723d89cb7b0 SHA-256: 7af141ef55fd1e7441da5afe9dd3b8c20459730744d89ec873a320612efc6fe6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same URL and references to PDF downloads, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of multiple SEO-linked PDFs points to a link farm used for 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.ru/pify?keyword=renewable+energy+sources+mcq+pdf In PDF document text
    • http://files.fuserealtyhomes.ca/uploads/1/3/1/4/131453695/7769f2190.pdfIn PDF document text
    • http://wisogoja.lakesmogtest.com/uploads/1/3/2/7/132740978/dbd189bdaab69.pdfIn PDF document text
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdfIn PDF document text
    • http://files.nickjagger.org/uploads/1/3/0/8/130813639/4d890949633.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/1/0438/1540/3682/files/35274805739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/bioreactors_for_animal_cell_culture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/pasope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/2300404947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/70663204733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/frost_mage_artifact.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/6389190122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/72278360482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/muvut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/medar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/great_writing_4_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/bitadujimuvapusamop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/2001_honda_civic_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/posewivipuresipagudijafan.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 8

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_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 5944 bytes
SHA-256: 40fc5a4bb86af8bfcc25282ce1188c2c0219da9ade031cfd73b3a3b981241b9d
font_01_sfnt_off00007943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 10376 bytes
SHA-256: 190b42a8098b1edd23c26688790d67f81e0e1dc13f687394af1f1235a46b7409

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