Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf62247044b85f8b…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 13:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f1a743b168d8f1b5567f057a6701ef5 SHA-1: e1b8f72451c0581dd8e60369ad63546f59a1bf48 SHA-256: bf62247044b85f8b0d6603c6d828b6076f74775d98d1dd94e865611080c234ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains the same URL and other PDF links, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves redirecting the user to malicious infrastructure via a deceptive link.

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=2020+presidential+election+results+sri+lanka+pdf In PDF document text
    • http://files.stergioschatzikyriakidis.com/uploads/1/3/1/0/131070538/veseferunedod.pdfIn PDF document text
    • http://bijipikam.scw9.ca/uploads/1/3/1/0/131069934/kusovajizaja-jivuxulave.pdfIn PDF document text
    • http://files.warrensmithdrums.com/uploads/1/3/0/8/130813314/d62cecd88b2.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/1/0439/1760/7067/files/xaruxigiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1723/8688/files/vefalok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/33861654055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/biology_lab_experiments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/7134063830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/ridititenozen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9741/4045/files/rrb_alp_answer_key_qmaths.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6957/1233/files/xokelapazixuxasigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/ultimate_ironman_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/87589169258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/scp_containment_breach_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/wofux.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 3

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_off00005798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5798 5392 bytes
SHA-256: 4a9ac1d5ebe66768b77ba9bf4ca9f8baee69384dcf4bd1e670485767eae88db7
font_01_sfnt_off000069ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 9836 bytes
SHA-256: 50075e01b29153acf56f639bc266680517786432be66c524a67d4a257a26fda6

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