Malicious PDF — malware analysis report

Static analysis result for SHA-256 71887fb45a4341d9…

MALICIOUS

PDF

93.6 KB Created: 2020-10-04 16:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 187ae2afc455e2ebde7d651ce5751466 SHA-1: 278a7c6364e274b5f2dad2f9c33eeab3357ca772 SHA-256: 71887fb45a4341d9010a4642a05b6091167d3367ac8e68e7d7bc24ca1af1b356
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ggtraff.ru/strik?keyword=%25C3%25B6%25C4%259Fretim+ilke+ve+y%25C3%25B6ntemleri+ders+notlar%25C4%25B1+slayt'. This URL is identified as a malicious redirector, likely used for phishing or distributing further malware. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/strik?keyword=%25C3%25B6%25C4%259Fretim+ilke+ve+y%25C3%25B6ntemleri+ders+notlar%25C4%25B1+slayt In PDF document text
    • http://kifemis.cancercoloring.com/uploads/1/3/1/0/131070450/380a04d2c66c5bc.pdfIn PDF document text
    • http://jizezose.dazeyjayne.com/uploads/1/3/1/6/131636947/9055105.pdfIn PDF document text
    • http://juxesa.baydreamsleep.com/uploads/1/3/0/8/130815009/76c061c6.pdfIn PDF document text
    • http://files.redenviroforum.org/uploads/1/3/0/8/130873738/vuraripukatujij.pdfIn PDF document text
    • http://files.uckfielddivas.org/uploads/1/3/1/4/131437413/lijexodidowizu.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/1/0430/0485/4435/files/animals_in_arizona_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3204/6489/files/neck_pain_disability_index_scoring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/sony_dvpsr510h_dvd_player_with_hdmi_port_upscaling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1967/4271/files/sims_middle_school_teachers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4311/0302/files/all_aboard_games_kamloops.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/atlantic_research_group_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/33133070241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5854/3771/files/vekodirinoveganini.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_off00012d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 5656 bytes
SHA-256: 74e5ca8645c78242e17cfcf75cf1568d1a5f734c3badfdf6a9959c54870d0fb8
font_01_sfnt_off00014029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14029 12332 bytes
SHA-256: 11c03df595417269fec6d6b38acc6c67e1934f426032ae2ac2ddf15bb1191f8a

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