Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6237f67c2a17392…

MALICIOUS

PDF

53.3 KB Created: 2020-08-05 03:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df2a586038f845788d57306fb2be66b5 SHA-1: d46255e73c431e60fec4dd2e55be89a76d950eb7 SHA-256: e6237f67c2a17392a9c8c7569e57d0cc792a63d3f248becf6cf26bcc8e87ae65
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.ru, indicating a malicious intent to redirect users. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially garbled, contains the same keyword as the redirector URL, suggesting a lure for users searching for 'air pollution and quality control notes pdf'. The embedded links likely serve to distribute malware or lead to phishing pages.

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=air+pollution+and+quality+control+notes+pdf In PDF document text
    • http://files.hestercox.com/uploads/1/3/2/3/132302896/ruwaza-badofi-gatovutag.pdfIn PDF document text
    • http://files.exploremathindemand.com/uploads/1/3/1/3/131380094/xagakukegenesara.pdfIn PDF document text
    • http://vawegita.takeaclasswithlaura.com/uploads/1/3/1/4/131453215/sonewajulewejojog.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/1/0432/6676/9051/files/39468025912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/69863306521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/lizesujiwadapam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/bulojosovave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/50211492010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/talezidux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/rubuperabudujibizel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/jovudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/14896784580.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 5368 bytes
SHA-256: c521cfc4c9a4e1211088368657090c32ead91c9bb7ad49419798c2b0daae03d0
font_01_sfnt_off0000869c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 10448 bytes
SHA-256: 4169a29ce4954ff2e936bccfb6c329128f44320642dc1ad90c6e6525590fc6bb
font_02_sfnt_off0000aa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA36 18684 bytes
SHA-256: 22789f6d822f0df277af9bb0f7b9180970341dccef01b43327e338765a7a0fc8

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