Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d05ee09d454834…

MALICIOUS

PDF

37.9 KB Created: 2020-08-24 00:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf5b215ee8567b134d70c6d48dcd3c83 SHA-1: 16b537fa77f99e311d4a0f7539dfb74530bd7e50 SHA-256: f7d05ee09d4548340b11e29c212037cdf64279cd452d1f9e4f55e8ef94ffdf48
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'Algebra 1 equation sheet'. The presence of numerous external PDF links suggests a link farm or phishing attempt.

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=algebra+1+equation+sheet In PDF document text
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdfIn PDF document text
    • http://files.hollyhmiddouche.com/uploads/1/3/1/4/131438071/738dd704b112eb.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/1/0428/7807/5036/files/54127863415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/42862067154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/bimasekexazewewozene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/latest_tamil_movies_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/vujozanugidokijem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/structural_building_components.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4780/files/cardio_workout_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/dibabitewojatakot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/5380455819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/tidowanodikuvuwexiker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/xilifugukax.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_off00005afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFA 5252 bytes
SHA-256: 3697c2ca920f5ea9eb8fc21fb20b835ef51c6d1d2ead5dd061b2a5610edaeb14
font_01_sfnt_off00006cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD1 8880 bytes
SHA-256: bc0a209a3dc3c71f0529e7e21592e3ad4422b2a5fb50fe245532b0359381cf26

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