Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad05de38a348bd9…

MALICIOUS

PDF

44.5 KB Created: 2020-08-25 16:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44fced05a61b995aee83b5432e825eb6 SHA-1: 1a821be1fc9c6d6382d062c5b98ce8c044a5934c SHA-256: 4ad05de38a348bd9d75d48163baff6d8f748f983d06b3a7a3a460d1979b4ff1c
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.cc) and then to various domains hosting PDF files. The document body, though heavily obfuscated, contains text related to 'basic electronics engineering book pdf free' and the malicious redirector URL, indicating a lure to download potentially malicious content. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or malware distribution 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=basic+electronics+engineering+book+pdf+free In PDF document text
    • http://divexixu.aboutnatureco.com/uploads/1/3/1/8/131857247/956acbef.pdfIn PDF document text
    • http://gutifafew.futurescholarslearning.com/uploads/1/3/0/7/130774982/kenev.pdfIn PDF document text
    • http://files.designsbydinius.com/uploads/1/3/0/8/130814397/sodedavuz_vapevaxewitokov_fexufatores_tevodijapaw.pdfIn PDF document text
    • http://zudul.alyssarcieri.com/uploads/1/3/0/7/130738902/30bbb3.pdfIn PDF document text
    • http://files.goodformanly.com.au/uploads/1/3/1/3/131379732/239140.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/1/0448/9232/3995/files/editor_to_word_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/11740612415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/83555767612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/pefowiwemofalitagom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/powowakiwojaxebize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/sosujeberufoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/minecraft_bedrock_edition_entity_id.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 5576 bytes
SHA-256: 79532a8793e58210816c51b93caa78c6bd366a88a8f39720efadb8917714b189
font_01_sfnt_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 2116 bytes
SHA-256: 2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
font_02_sfnt_off000073ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 15300 bytes
SHA-256: 6c53b86e3dc2b70f872b3aff7315acbadf01abf1e286dca030bb12c8887f6135

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