Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8d9b9731a81044…

MALICIOUS

PDF

50.5 KB Created: 2020-07-28 04:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b79308f4adaa634e2a69c0d8a2c7ae1 SHA-1: 5c39ab5a81469af6f2b7da0799253825dc7a0f5b SHA-256: 1b8d9b9731a81044fdb9f33e20d375f8b3808b6b3d435b5c8ac37c085edb0963
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=pop+piano+sheet+music+with+letters', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Pop piano sheet music', suggesting a lure to disguise the malicious intent. The file's creation by wkhtmltopdf suggests it might have been generated programmatically to host these links.

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=pop+piano+sheet+music+with+letters In PDF document text
    • http://files.ecrirebeaute.com/uploads/1/3/1/8/131856703/zefob.pdfIn PDF document text
    • http://files.revivalfamily.ca/uploads/1/3/1/6/131636951/8420405.pdfIn PDF document text
    • http://files.clearlightastrology.com/uploads/1/3/1/4/131436956/8830642.pdfIn PDF document text
    • http://files.detroitlakesucc.org/uploads/1/3/1/4/131406855/dibipaxilifovez.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/1/0438/5128/4642/files/62991300323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/laroroligebodegudepabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3336/files/97873768429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/vejade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/23021840365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/17231629370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/44687579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/67199270375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/kokitoxosaxufebufijifisuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/79821733693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 5148 bytes
SHA-256: 326cb39ffaa36dcadb2d30758bd4c419db7576f2fac5d6633a200a2c16753b9b
font_01_sfnt_off00008fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC1 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000984f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984F 10408 bytes
SHA-256: 48b3b9b58ff5ec095426eeae91dcff4eac8aa3efb622f45a09463b90c6780d01

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