Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b51e2c09a61948…

MALICIOUS

PDF

50.0 KB Created: 2020-08-07 08:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a1d962c187af6205f8d30ec90c3ceff SHA-1: 8be1cc54bfaafcf75c5d7925f1934b73bd898289 SHA-256: 77b51e2c09a619480ffce25f60ca7b76e551e1b3ee8cc1c3f8b88bddb8323562
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDFs, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary redirector URL, https://ttraff.com/pify?keyword=carols+for+choirs+1+pdf+free, is flagged as malicious and likely leads to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=carols+for+choirs+1+pdf+free In PDF document text
    • http://files.albertpyun.net/uploads/1/3/2/6/132681504/2ad85.pdfIn PDF document text
    • http://files.kalaemano.com/uploads/1/3/0/8/130813777/babodumesud-bebowepefabif.pdfIn PDF document text
    • http://files.johnhain.com/uploads/1/3/1/8/131856365/f3521e4caf3.pdfIn PDF document text
    • http://files.adriantobinartist.com/uploads/1/3/2/8/132814276/nuwejowam.pdfIn PDF document text
    • http://files.bestcannabiscancer.com/uploads/1/3/1/6/131606876/nimetami.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/1/0436/8993/5003/files/wufivejuzefanesisog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/nejuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/33035275316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/13367858492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5481/3599/files/baby_bloomers_pattern_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/xonozanuvowonalubole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/xuzivunukovamopafiviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/autocad_commands_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/84896788754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/16048133165.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 4

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_off00007dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 5200 bytes
SHA-256: 5b8db5b6014cb33baa4818762df6f08cd0778306301bc2f03be6561dacfb89f3
font_01_sfnt_off00008f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 14160 bytes
SHA-256: 83d3f00422493c8ef6a030d572f642f0eb69cfe6dbc83e2bbb71f464129f8f9a

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