Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3f961c35f9d4d1…

MALICIOUS

PDF

32.3 KB Created: 2020-08-21 05:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d39cf36a2db5a9f0b1fe866d6ea6861a SHA-1: 0988f4dcdaf82ca6fe46a628f01b01c75d18e34a SHA-256: cf3f961c35f9d4d196f1563d931d932915d56bce8e4da74abaea39bf1a215724
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.cc/pify?keyword=american+pie+piano+sheet+music+musescore, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to sheet music and the malicious URL, suggesting a social engineering lure to drive traffic to 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.cc/pify?keyword=american+pie+piano+sheet+music+musescore In PDF document text
    • http://dirurorob.artartmargaretcameron.com/uploads/1/3/0/8/130874565/waxaro.pdfIn PDF document text
    • http://files.lightworkselectricny.com/uploads/1/3/1/4/131438538/fusotabatudev-jesore-lerox-vuvul.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/1/0435/9120/5021/files/xekegumafelikuvelogex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/jingle_bells_piano_sheet_music_musescore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/gamekepagedakoxubeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/android_root_directory_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/java_tutorial_javatpoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/calculus_and_its_applications_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/94754096282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8696/files/94414974393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/roworuvirevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/zusesevarevuxunegiget.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41D4 5128 bytes
SHA-256: 5e360664d65e9f31e49bf614aef61068d325d7a101d064b042f5c4e4453b688b
font_01_sfnt_off00005307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5307 9776 bytes
SHA-256: e81634636d7b0fa6b40f8e04907db349362077d782153b2177b87f7eb4ee38cd

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