Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9b5b8095e43816…

MALICIOUS

PDF

41.6 KB Created: 2020-11-02 03:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0715f5ceb780e352628e04c3abe247b8 SHA-1: 91fd2d00bf4374f000dcb11801d5fdc6c51fa7d9 SHA-256: ae9b5b8095e438163b75dce61dd6b00fa1a827758f87d263db80627813b9fe1b
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as 'samurai sword training videos'. This indicates a phishing or scam attempt. The PDF also contains a large number of links to other PDFs, suggesting it is part of a link farm designed to manipulate search engine results for SEO purposes, likely to distribute malicious content or scams. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or scam campaign.

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/123?keyword=samurai+sword+training+videos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f9131c50b288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f972938ccf30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f9f623d9d8b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f931737761cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mukutud/ilive_bluetooth_speaker_ihb23b_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4844/1285/files/boundaries_circle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68dafc4f-ea56-4a21-a33d-19308eb8dbe3/74447365298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3068/4063/files/moriserugifafe.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/xonoliwavosedozepavuzan.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/amicalola_falls_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d23e169-66de-496a-b675-eb9bda67fb54/15989010573.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/missouri_university_of_science_and_technology_world_ranking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2775/4908/files/sopitowomukanorixivo.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/24864140511.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 1

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_off000065ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EC 5368 bytes
SHA-256: e57528b72cc172f94950db68f0841a64a04fd69f5004c706607224b607d79dc3
font_01_sfnt_off0000782d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 9904 bytes
SHA-256: f64b188548b86f2d7a0183981478c31efd7692e2b37cdddea5b81e92d7bbb37e

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