Malicious PDF — malware analysis report

Static analysis result for SHA-256 16be5de65c2af684…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 10:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24f8c022645621fba804c053c8ff3e6c SHA-1: a15d1ff1c41f223381bbc76e490817967022c15c SHA-256: 16be5de65c2af6846d35f2d8adc27749dd92388054388413cf663059e24f6a23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This link is presented as a lure for free sheet music, indicating a phishing or scam attempt. The PDF also hosts a large number of external links, suggesting it is part of an SEO link farm designed to drive traffic to potentially malicious sites.

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=the+swan+cello+and+piano+sheet+music+pdf+free In PDF document text
    • http://files.3dretrievers.com/uploads/1/3/1/8/131856769/1867059.pdfIn PDF document text
    • http://files.isaacchapple.com/uploads/1/3/0/9/130969768/xejojaxanaradir-tiduf.pdfIn PDF document text
    • http://files.hillandstump.com/uploads/1/3/2/7/132740270/8730535.pdfIn PDF document text
    • http://files.pochemuchka.com.au/uploads/1/3/1/6/131606092/91702ef6.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/1/0433/9240/1571/files/nejovepedegerogewil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5724/0478/files/18803847572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/fogepuvuzudavulinebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/200_top_electrical_engineering_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/vakasov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/nemapatogulapimego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/duzefitatutokad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/43801365467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/fubumokakiriwetaseri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/45812894229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7918/files/49486412026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/51147253167.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 5436 bytes
SHA-256: 2ca29207dc3d728bd264d9c810203cd6afc058e207ceb4177a7fa1da85d4dde7
font_01_sfnt_off000077dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DC 10600 bytes
SHA-256: ec3a72783be609fa6d6a59669106b7f3e61840bd09917d2935ac0c30933a80ab
font_02_sfnt_off00009bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD4 16184 bytes
SHA-256: 4360e29b7d2504916afe74d557016965ce00ddb6e9b1d1498b998f2d7a1046f9