Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbbc1d6632ea5d1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 21:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50d05e296d8298abc81d08d0769a7659 SHA-1: af7a95a36f060c599de16cfa0cd30fbb2ca6f7b1 SHA-256: bfbbc1d6632ea5d18342eb94de40e9e1655453635a4085ceb76524a92075beb8
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Pharmaceutical sampling booth guidelines' and the malicious URL. This suggests a social engineering lure to trick the user into visiting a malicious site.

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=pharmaceutical+sampling+booth+guidelines In PDF document text
    • http://files.windowsmanchester.com/uploads/1/3/2/7/132740553/ac864241391d19.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/1/0429/5881/5398/files/entrepreneurial_finance_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/backout_letter_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/joraxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/pakiwosevokagalatum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/72546222702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/51018057780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/bombsquad_hackeado_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0115/9585/files/princeton_review_lsat_book.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 1

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_off00005a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A20 5628 bytes
SHA-256: 02c5701a96f452fb6ad777892f77bef54f709860fe649502024befbbf1637a4e
font_01_sfnt_off00006d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 13844 bytes
SHA-256: a5acf46797cab7b343d459b2c29c39193f02271c9f35b8bff1db252a28eaf874

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