Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b91bd6de5a29897…

MALICIOUS

PDF

38.6 KB Created: 2020-08-20 01:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 211daad216d31d84daaffb2dea188586 SHA-1: be1cfdb4659ce1483206374f856c169f4854e226 SHA-256: 5b91bd6de5a29897f2c544474a7a36d131207727f72d3e8ef316153ea3608db6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure to encourage clicks. The ML classifier strongly indicated maliciousness, and the presence of redirector links points towards a phishing or malware distribution scheme.

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=burris+eliminator+2+manual In PDF document text
    • http://mosab.divinebeautyexplored.com/uploads/1/3/2/8/132814930/da009d.pdfIn PDF document text
    • http://files.chordof3strands.com/uploads/1/3/1/3/131383269/xives.pdfIn PDF document text
    • http://zulobebod.ttceholidays.com/uploads/1/3/2/6/132696212/dunorewegewate.pdfIn PDF document text
    • http://files.truthtellerpub.com/uploads/1/3/1/4/131408056/pabejujut.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/1/0434/4463/3750/files/5am_in_toronto_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/bumivawefosefoforiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/41101017250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1724/0733/files/89777690181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/tabutabezelakekepasop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/test_laptop_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/tekoneselip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/jexekajira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/pukozijuwofo.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_off00005a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6E 5012 bytes
SHA-256: 3595d67b70d126d680575ec66afe143db2c69856556243446773d4fa243dd11c
font_01_sfnt_off00006b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5B 10032 bytes
SHA-256: 8f1a2d3c2d451d505f72b4cba055c8d0765bb25b4dc1192b190d9fb68601e41c

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