Malicious PDF — malware analysis report

Static analysis result for SHA-256 335e44958dc9c934…

MALICIOUS

PDF

55.7 KB Created: 2020-08-04 15:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be7920007594a67985d4ec906181b4ed SHA-1: b3a54097a682e2ae8d4f9bae07ce615f2603b144 SHA-256: 335e44958dc9c934ccddf44bbe347ce5f47b26784c395c0e7c16facbea9d44c2
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=arduino+full+course+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains embedded URLs that are part of a link farm, further supporting the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=arduino+full+course+pdf In PDF document text
    • http://files.newarktherapeutic.com/uploads/1/3/1/3/131383247/12fe6aaa.pdfIn PDF document text
    • http://files.aarondarling.com/uploads/1/3/1/4/131483053/3774913.pdfIn PDF document text
    • http://files.faithacademyashland.com/uploads/1/3/0/7/130739214/1f488a9dae7.pdfIn PDF document text
    • http://files.learningforlittlepeoplepreschool.com/uploads/1/3/1/4/131453950/92198.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/1/0428/1021/2518/files/22214879472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5022/9143/files/bimoxuxogixut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4550/3655/files/86761540529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/sojasazosiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/3966285528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/2460850508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3292/0732/files/wufired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/abu_hamid_al_ghazali_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/11549590484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/56831758502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/xelefotebok.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_off00008ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF8 4928 bytes
SHA-256: 8b768a7aea60a2c828ac913bbecae411daf85a7520ada070b9298cc53b2c35dc
font_01_sfnt_off0000a0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D5 15916 bytes
SHA-256: 38a3bd52730a1d6d3678b561a3c715453f813ebcb320a63db190a722b136904c

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