Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfef5db889882c10…

MALICIOUS

PDF

37.6 KB Created: 2020-08-20 21:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 11f23b9b7a0f25ecbbabb9d97b6f8781 SHA-1: 63efed17aee98446715b9b7f8a5482b1c62b4270 SHA-256: bfef5db889882c10bdc9c7d7ce05767afbde16d85c5bb2f12c427f62f8382b63
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.com/pify?keyword=chemistry+physical+and+chemical+properties+worksheet+answers'. This indicates a social engineering attempt to lure users to a potentially harmful site under the guise of educational content. The ML classifier strongly supports the malicious nature of this PDF.

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=chemistry+physical+and+chemical+properties+worksheet+answers In PDF document text
    • http://files.votect2016.org/uploads/1/3/1/6/131606366/pazul_siwobuf_xebixonuwimavu.pdfIn PDF document text
    • http://files.carolgrice-curran.com/uploads/1/3/0/9/130969712/e91816f1096b7.pdfIn PDF document text
    • http://faseg.newlifecitychurch.org/uploads/1/3/2/7/132710780/16d2d9e1e9b.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/1/0450/9194/6661/files/98439169660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/arrangement_of_electrons_in_atoms_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/4326024066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/teberipojugemuwusemozuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/ragumexarodupitubasawulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/tirijufomiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3473/6797/files/28120631688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7422/3269/files/42979509551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/38161021345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/zutoxokajegitujokira.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_off000052ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EE 5476 bytes
SHA-256: 5687aa4f07794a979dcefac6448c7eea00a121a96a448ee0de1c8dc7ee3e38cf
font_01_sfnt_off00006574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 10532 bytes
SHA-256: ffb5383a1bcdee32bdec953293938ef6d0fca423592a8d08eb8a72dbe9666abb

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