Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1233ca5c2a41fd…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 16:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8bb1be7033924bb878f940db3931983 SHA-1: 164903247b4d8062f16e0dd07b874ddbb2b88615 SHA-256: bf1233ca5c2a41fd6f14536d74a350f8ba345a43de49efc1238c176758536898
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments and URLs that suggest a lure related to an academic worksheet. The presence of a malicious redirector indicates an attempt to deliver a secondary payload or conduct phishing.

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=ethos+pathos+logos+worksheet+high+school+pdf In PDF document text
    • http://pemonuxi.marcminsker.com/uploads/1/3/1/0/131070487/kenidefujewameki.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/1/0431/6708/8791/files/live_flight_tracking_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/kilof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/36162235444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/kumuxubosedatakudigeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/69472129643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/wusowanoger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/powogajatobowawaxaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/gukuzeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/axa_annual_report_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/rafefavigelidewawoviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/warlock_class_guide_5e.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_off00005b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7B 5532 bytes
SHA-256: 1275f75a3e6b8d2948df14b7c063768fc7443f63c2523193dba01a357bcb9420
font_01_sfnt_off00006e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 10072 bytes
SHA-256: a97994e9af5f46ad3f71a0314e00d32cc89041dd5bba45b4f6121a1088297d1c

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