Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f274253abfa37b…

MALICIOUS

PDF

48.5 KB Created: 2020-08-11 07:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59a0bc2ae956771863275d46a6893972 SHA-1: 3b0ffdc8e02005711efd965a7721cad6a4ef5df8 SHA-256: c5f274253abfa37bca46959c362b5d653bfad06860b1e796a277a9fa92ccd224
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/pify?keyword=adeste+fideles+pdf+choir', is flagged as a malicious redirector. The document body contains garbled text but also includes the same malicious redirector URL, suggesting the primary purpose is to lure users 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=adeste+fideles+pdf+choir In PDF document text
    • http://wuxisutut.performance-icehockey-english.com/uploads/1/3/1/4/131453540/temulewewo.pdfIn PDF document text
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/8/131856232/nifaniro.pdfIn PDF document text
    • http://files.whidbeyworkingartists.com/uploads/1/3/1/3/131380773/b3e4ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/61617743706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/kokuvawalikubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/bijafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/joxupowogemodelibobetexek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/xabaputujonasor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/bupiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/zajebelomuxobabunokun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/54219806077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/48130911685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/77622204031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/kupusab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/suwixinetamepav.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_off00007039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 4704 bytes
SHA-256: 624d23c452b28be26b4fdae34c7778e0c70654a22f548b926f40c89f8e38986f
font_01_sfnt_off00008043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8043 12088 bytes
SHA-256: 275bf6fe8d31de45f08c39d98290b29118f52c2f59df7c16bc82a11c83e939cd
font_02_sfnt_off0000a6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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