Malicious PDF — malware analysis report

Static analysis result for SHA-256 57271c31e6574f39…

MALICIOUS

PDF

56.2 KB Created: 2020-08-12 02:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66a351073deede346be3767a964a062c SHA-1: 110378463c4e334de9b05cba9fb73a8aaee2003b SHA-256: 57271c31e6574f3959e108f43f85d530d262dba2ac45e8cd8e123ef71287e3bb
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious redirectors or SEO-optimized PDF farms. The primary malicious link identified is https://ttraff.cc/pify?keyword=collins+cambridge+checkpoint+english+workbook+7+answers+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to educational materials, suggesting a lure to trick users into clicking these links.

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=collins+cambridge+checkpoint+english+workbook+7+answers+pdf In PDF document text
    • http://files.jennifernunweilerrmt.com/uploads/1/3/0/7/130739116/jofine_lirakimoja.pdfIn PDF document text
    • http://files.maimonidesminyan.org/uploads/1/3/1/6/131637889/4179854.pdfIn PDF document text
    • http://nabenezu.ffcalaska.org/uploads/1/3/0/8/130814526/7125363.pdfIn PDF document text
    • http://files.silvercreekbiblefellowship.com/uploads/1/3/0/7/130775171/kixofokuvexesagalo.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/1/0434/3883/3816/files/ccna_dumps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/mevazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/fundamentals_of_analog_and_digital_electronic_circuits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/30143833767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/zenugakenaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/65418101567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/cartilla_accord_salud_plan_310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/bosel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/16406614878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/design_thinking_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/reliability_centred_maintenance_moubray.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 7

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_off000095f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F5 5852 bytes
SHA-256: de53f526cf4a882aa5f86d4c25198844f0ff2dc087386f881248f6922326fb5e
font_01_sfnt_off0000a9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BC 12732 bytes
SHA-256: e3e5e395380b92bb954efc2a4c5b2450b0cae608ce1d4ff28cf2e7f67dcdb2ea

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