Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd5782ccee7258d…

MALICIOUS

PDF

50.3 KB Created: 2020-10-17 11:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e4638d1c67c7dd2b25b2223968d0d93e SHA-1: b32e2c493917d626e315d3ab41045d7b0a9846b5 SHA-256: ddd5782ccee7258d75dd7feb9abb5a26cf606a2bc19cc3ca0228d0dcfc901791
184 Risk Score

Malware Insights

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

The PDF contains a high density of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to drive traffic to malicious sites. One such link, https://gettraff.ru/123?keyword=tendinopatia+de+aquiles+pdf, is flagged as a malicious redirector. The document's structure and embedded links suggest it is part of a phishing or scam campaign, likely delivered as a spearphishing attachment.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=tendinopatia+de+aquiles+pdf In PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/logajoza.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9668666.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/b9247dde35.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/2f8ca042a26b.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/munonomisiwin.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/7301557.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/87c690d.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/9120454.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/jozidutatukapo-ribewudixug.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/60bee0f91e6.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/5740840.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/zalevenodekaxek_sifiwaxev.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/lubineli.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/1/0432/4828/7904/files/89424805514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1620/5989/files/wigosapefodofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5348/1625/files/garmin_etrex_10_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875fcc7d-1d7e-4aef-ac6a-1d45d3afa4f9/28716899061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daae3a90-a4d5-4b3a-8853-b2cccbdb9044/20178526691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eac096-9585-410b-a2a8-328980811d04/66443809214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130ac363-3a8a-4f26-84e4-91e4fe9b9012/96150331755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cecf984-2d92-49b2-870f-cc9da51fbfd1/13051719490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed5dccc-d6c1-4407-b18e-4a1bf2fcffcd/9490673793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f18655-e830-4f24-b683-55fa00b85cd0/93601417304.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_off000086a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A3 5012 bytes
SHA-256: 300555c2ad63719af7b13418eadc1b92e8c3240f0dc790525d773cfa9ce5f75f
font_01_sfnt_off000097c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C1 10568 bytes
SHA-256: 0487c01694378c1b7c47db81e59ea90b05eead3a2ed926f6f067796e93952545