Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b18e001db727bc…

MALICIOUS

PDF

67.6 KB Created: 2020-08-13 22:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edcb5469658a2f91405ad7c6727107d7 SHA-1: 4db984ea1a24385a712140e5ee9c31980837286a SHA-256: 50b18e001db727bc97018187cde7c7cf457eb45ea444cbfdb750ecf27eeaa657
162 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a significant number of embedded links. One of these links, `https://ttraff.cc/pify?keyword=bootstrap++button+file`, points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large link farm further supports the malicious intent.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=bootstrap++button+file In PDF document text
    • http://files.johannariddle.com/uploads/1/3/1/6/131606807/3609761.pdfIn PDF document text
    • http://files.ourhiddenhills.ca/uploads/1/3/0/8/130874104/wilazig.pdfIn PDF document text
    • http://files.aleehannah.com/uploads/1/3/1/8/131871992/6569848.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/1/0430/1645/4305/files/49923760785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/56882914572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7185/files/honkey_tonk_heroes_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/appendicite_aigue_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/73613241827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/40258147350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/vupusedipegug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/platonism_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/puzinekivugewov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0265/0011/files/12th_time_table_2020_up_board_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/upkar_publication_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/grove_manlift_manual.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 3

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_off0000bb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3A 5084 bytes
SHA-256: 5511fcb09da3d2bfaf674e200b3feb37db49dbbd15ffe693a8a2e619c225c0eb
font_01_sfnt_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 17096 bytes
SHA-256: 0b4e1335a69446c94da4082c2eb1dd3eaeb06eb3ea040fbe063884ac56e8e1d0

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