Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b43673a9f93f80f…

MALICIOUS

PDF

32.3 KB Created: 2020-08-19 00:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91bd3c65e6355e1b217f4a25ad1a3f5b SHA-1: e95a70bc53ca4c349ec6287bceb2df3e75152d31 SHA-256: 4b43673a9f93f80f1e0580ab1adaa496bf3946d7742e535e2d93e996cdad80ed
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=biozone+international+2012+worksheet+answers'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is 'http://bebimilig.olygarfieldpta.com/uploads/1/3/1/6/131607600/tekuponosoradud-nanikoreda.pdf'. The document body, though partially corrupted, includes the target worksheet title, suggesting a lure to entice users to click the malicious link, likely for phishing or malware delivery.

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=biozone+international+2012+worksheet+answers In PDF document text
    • http://bebimilig.olygarfieldpta.com/uploads/1/3/1/6/131607600/tekuponosoradud-nanikoreda.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/1/0429/6772/8281/files/sexobap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/besuledudurivixikedebexuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/fomarokubejezapazorolunaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/47166602304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/70806784967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/54530620090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/4260/4965/files/astm_dictionary_of_engineering_science_and_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/waxigulazatep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3601/1678/files/vabazaganugitazuvuxatubal.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 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_off00003f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F92 5352 bytes
SHA-256: 8f9d19d2a9365224dd50ed316ec6524c7920f5c0b65467be1323021408f6cfd6
font_01_sfnt_off000051d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D7 9728 bytes
SHA-256: 16d2a0cb68b372eb0e963a4e046b7165f469bb75d39fa785c143913088d6d604

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