Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f623183ba58cdb…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 08:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f18e1d18629d405ca386add61132a7e SHA-1: 1e751228d95d02c80c38f75f4ac80c27aeb282c6 SHA-256: f4f623183ba58cdb93cfbea4eef17232e48be9e564d9ab4e13373dfb64c576dd
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm. The document body, though corrupted, contains text related to a worksheet and the malicious URL. The primary malicious URL is 'https://ttraff.cc/pify?keyword=synonyms+and+antonyms+worksheet+with+answers+pdf', which is designed to redirect users to further malicious content.

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=synonyms+and+antonyms+worksheet+with+answers+pdf In PDF document text
    • http://files.kansasnursingstudents.org/uploads/1/3/2/6/132695883/ba4d7afc799f7.pdfIn PDF document text
    • http://files.abteendrivingacademy.com/uploads/1/3/1/4/131437276/54837df6c.pdfIn PDF document text
    • http://files.zapco-paper.com/uploads/1/3/1/1/131164174/repipovipemikolu.pdfIn PDF document text
    • http://files.michaelmackinomara.com/uploads/1/3/1/4/131453061/betazevibiwup-taverup-bosojepudij-noberikubipukox.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/1/0432/9691/5621/files/dozefibatevujufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/apicultura_in_romania.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/gawepafikobenadifimabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3855/5805/files/vezalawubobifakabununamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/alfabeto_hebreo_moderno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/persist_volume_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/gilodat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/43876436820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/rejilepomax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5200/6552/files/pudadotiret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/2002_chevy_trailblazer_service_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D6 5608 bytes
SHA-256: 2e4c12199cb09c904b6b98759c5dc3734386575a8988a3de622be4b02a2b7a89
font_01_sfnt_off000084d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D8 11888 bytes
SHA-256: de1c359d46c7318d9327d2ab2bfeb35d1e9e7d6b477b07004e6fa1e7df0137b1

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