Malicious PDF — malware analysis report

Static analysis result for SHA-256 4206c8c72fafd5f8…

MALICIOUS

PDF

62.5 KB Created: 2020-08-06 06:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88cd66b257c60583929ba8cbcdf88122 SHA-1: 9875ac2514323372dce48c215adcd7d2907a6c0f SHA-256: 4206c8c72fafd5f81f7bf1aa6b9eea16d43739c5977312dc7c9c3d5cb71dc384
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The embedded URL https://ttraff.cc/pify?keyword=bjt+transistor+tutorial+pdf is a primary indicator of this malicious intent. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to obscure the malicious redirector. The document body, though heavily obfuscated, contains text related to 'Bjt transistor tutorial pdf', reinforcing the lure.

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=bjt+transistor+tutorial+pdf In PDF document text
    • http://files.charlestonejc.org/uploads/1/3/0/7/130739099/dafaw-pepovazemerim.pdfIn PDF document text
    • http://files.environmentalspillcontrolllc.com/uploads/1/3/1/6/131606697/vowilev.pdfIn PDF document text
    • http://files.support.famhealth.com/uploads/1/3/1/1/131164425/1814940.pdfIn PDF document text
    • http://semixiwag.urbanthreadla.com/uploads/1/3/0/7/130775934/talagowezuwe.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/1/0436/2010/6404/files/black_jesus_ep_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8377/5643/files/loxesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/best_java_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/rovarukixilojukidera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/lubulelewaketu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2823/files/shabba_ranks_a_ap_ferg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/17198290480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bidoxug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/xomabapepunuwuriko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/30637312539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/83659848532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/xonip.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 2

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_off0000b815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB815 5160 bytes
SHA-256: a60755a09461cf5a013508057f22dff4c0c2c89ddc40408c5bd4e2f68bfe7fb4
font_01_sfnt_off0000c9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B7 10352 bytes
SHA-256: 396b3eb613f8fe68d833f2cee63b88c26fee148a9c289e5570559e8149ff82fa

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