Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a17220152302073…

MALICIOUS

PDF

40.0 KB Created: 2020-10-26 20:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 5f1954a8bb768a6cb36b3c50101e6d84 SHA-1: c4aba89fa554b9f162804e24eb62c110bbad0dae SHA-256: 4a172201523020731429499054d6da62100004c4dd31f3604a2e3e31e9771ed1
194 Risk Score

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=lowes+window+film+artscape In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f8f534eb2dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f93b94d7fe76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f94faf2ec3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f8995c5cdb48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5f8c518656a89.pdfIn PDF document text
    • https://zavigajigufuf.weebly.com/uploads/1/3/1/6/131637719/gokovoleziziw_xevutalesoxure.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/gikekivipev_rilatapoliliz_toxufotufa_zusovuxeseneji.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/lovilunufutunikane.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/zipape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5f900505a4f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f8f3a791e0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f951a6c56deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5f9041f47c4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f8cbb9ce2915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8de13bb7855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f88a5b496802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5f8c9c7f5094f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8c89f5c6768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f962f3c18642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b5b2b2-3c25-4cb4-abc6-a0cb7d86e24f/24463608687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c816e1-b5e3-4c1c-9998-c91dd86f0b80/22872989149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7abddf0d-9732-4c36-bd24-cd6541ab57cf/7708273588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed77e5f-b5c9-4595-96a6-093f4939a088/61739420831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba3d12f-ed1a-419a-8432-866dba1835cc/kumobor.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 5336 bytes
SHA-256: f7222c3e5fc6a671d74c1e7086009cb9a800bb9b602d2ce646161427135db433
font_01_sfnt_off00006db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 10760 bytes
SHA-256: 9fe7d6fbd03feba21da91d137901348dc548cf6373c5f23d605be8ad7e4c716b