Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ea26c218c84cf3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 09:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a383e22007284cb6b309c01756f0084 SHA-1: 1601fc1aadef1151c59a07842373b2eeb2674dc0 SHA-256: b1ea26c218c84cf33ec0397efa7066f80541f953284c8738b8bfe2eb3170881c
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, presented under the guise of a study guide, that redirect to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=cbse+guide+for+class+10+physics. The document leverages a link farm technique to distribute these malicious URLs, many of which point to benign Shopify domains but ultimately lead to the malicious redirector.

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.ru/pify?keyword=cbse+guide+for+class+10+physics In PDF document text
    • http://files.laurenclarkedesign.com/uploads/1/3/2/7/132740838/e09b4b68890.pdfIn PDF document text
    • http://files.freedomk9s.com/uploads/1/3/0/9/130969191/lovavive.pdfIn PDF document text
    • http://files.allijoyvazquez.com/uploads/1/3/0/9/130969801/df98bfe8.pdfIn PDF document text
    • http://files.nicoleedwardslimited.com/uploads/1/3/0/9/130969639/dfb54201395.pdfIn PDF document text
    • http://files.jubileemovement.com/uploads/1/3/2/6/132681670/746040.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/1/0439/3644/8667/files/61926087257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/42789053103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/sap_enterprise_asset_management_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70339383958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/45513999843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/royksopp_remind_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/4753857897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6738/2687/files/38852647643.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
🗂 Part of campaign: myorianstudio.com 4 samples

Related samples 5

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_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 5756 bytes
SHA-256: ec44e980a99ed78e4be75f285e1e4d08bac5c39f45f28683a6dee707db8b5bef
font_01_sfnt_off00007ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 9848 bytes
SHA-256: d90d8f10898c823f286fb9586585d948a91e78669a9dba83705fcde7758ad85f

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