Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7edbff70f493a3…

MALICIOUS

PDF

37.5 KB Created: 2020-08-14 13:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7629350444bff2fe4d12f41a6c29583e SHA-1: 29678b85df10521df2cfef528ac215e0ce7fe1bc SHA-256: 4e7edbff70f493a3f6afb4ba520f19eb1cd2b962adc4db3081df1d967d1eed51
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high number of embedded external links, a common tactic for SEO poisoning or phishing campaigns. The primary malicious URL identified is a redirector service, which likely leads to further malicious content or phishing pages. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

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.cc/pify?keyword=chemische+formeln+mit+latex In PDF document text
    • http://files.nekrubs.com/uploads/1/3/2/6/132681690/990145f2bb7.pdfIn PDF document text
    • http://files.gchumsoc.org/uploads/1/3/0/7/130775747/f03d2fa.pdfIn PDF document text
    • http://files.relmeng.com/uploads/1/3/0/8/130814127/wovabapebi-lumofibudoz-pipazuni.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/1/0432/5530/0249/files/allegra_pediatrico_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9516/9950/files/fufikebajomogulunen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/31568514726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/29131656052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/skyrim_se_parallax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/autopilot_mode_technology_in_vehicles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/panasonic_ne-_1054f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/49113329544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/94032815719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5407/0951/files/dexerisiviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/sutubusu.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 4

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_off00005238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 5096 bytes
SHA-256: 59deca3c52d19371521c1c54b5c7a013a221b9a648bffd4007aada1c31519f2b
font_01_sfnt_off0000635d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 11596 bytes
SHA-256: 794bb71bb25c6a7361d2c48b65a9abee5795852e3f1ee4d114b558197c25ac0f

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