Malicious PDF — malware analysis report

Static analysis result for SHA-256 766e6e9a48621829…

MALICIOUS

PDF

49.4 KB Created: 2020-10-11 05:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8700613c2f73454842b36c67de6fe5ca SHA-1: 2f6796b64bac5106fb6cd98037f777a887fce5cd SHA-256: 766e6e9a486218291063cdac2d12aae64a1440a62c87947bd9eb389ef04d506d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. One prominent link, "https://gettraff.ru/pify?keyword=couples+therapy+exercises+worksheets", is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=couples+therapy+exercises+worksheets In PDF document text
    • https://site-1042622.mozfiles.com/files/1042622/wugajedasexaw.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/5380762311.pdfIn PDF document text
    • https://site-1041613.mozfiles.com/files/1041613/kimebeke.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/83740395970.pdfIn PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/dipatunolawesabowagejegog.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/23323123165.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/77541067635.pdfIn PDF document text
    • http://files.johnwebsterpaintings.com/uploads/1/3/2/6/132695339/tajefidupi.pdfIn PDF document text
    • http://files.emmalucyillustration.com/uploads/1/3/0/8/130814121/7286647.pdfIn PDF document text
    • http://fatovemu.nihc.ca/uploads/1/3/2/6/132683138/pezofugamokuk-fabipa-puzejulagog.pdfIn PDF document text
    • http://vulif.tucsonactionnetwork.com/uploads/1/3/1/4/131407395/nawom_fapumawu_zekarivom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5472/9882/files/fobul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8560/5280/files/sniper_assassin_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7806/0698/files/jekupavakibevusunazabew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/binge_tyler_oakley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/begejivipitakeli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 5144 bytes
SHA-256: 629b4a57db600c445f91e9f0eaaa21239b22f60d45a5c66637d8b94914eed660
font_01_sfnt_off00008801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 10032 bytes
SHA-256: 22dbb4c5f76f696d3dfcc8fc803b9c4223c6fcb80dcdb29655fbf9df46415574
font_02_sfnt_off0000aa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA53 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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