Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfebecb72cbb7ca5…

MALICIOUS

PDF

47.6 KB Created: 2020-08-25 16:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4ca0c0aaf23895cad4816db7503c53b SHA-1: ed25d0192e7c60ca7ebf2e7c3c21ddf106fd8fe4 SHA-256: cfebecb72cbb7ca52500c0293a95e8b072290aee4db33232c0bec62f271ebd1b
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's primary purpose is to redirect users to malicious infrastructure.

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=nike+football+brand+standards+pdf In PDF document text
    • http://files.mycollegeknowledge.com/uploads/1/3/2/6/132695200/8391136.pdfIn PDF document text
    • http://tibew.absipartnership.org/uploads/1/3/0/9/130969950/tibigokodusinexisu.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/1/0433/7798/3651/files/27703072106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/cbse_12th_board_exam_date_sheet_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/50313906263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/5719899755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/8884388968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4958/1730/files/takug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/3058/8064/files/39352377863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0926/1987/files/amrita_nayak_all_song_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8112/5278/files/pengertian_obat_analgetik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/addition_word_problems_for_grade_3_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/biredakilulur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 4996 bytes
SHA-256: 818afc4a3cde076aa0aafeafd90a3f6d9d90010c60013b2d1c1bdf58d5a8f8b4
font_01_sfnt_off000080a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 10100 bytes
SHA-256: 31defbe5511484b65e8719cc60f2a42867d03a8f5f4257d6b57cd8b6259ce34e
font_02_sfnt_off0000a34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA34A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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