Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda07348daf2dced…

MALICIOUS

PDF

105.6 KB Created: 2020-10-16 01:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41caca506f8b8d79caafa2464762a297 SHA-1: 1a25145b4c4846073e6dd4cba2a7a43c1c2faf64 SHA-256: cda07348daf2dced09c985ad95ee7ec0145ecc2d70d3258c219f464646860459
124 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable domains and are identified as a link farm. One prominent URL, 'https://ttraff.club/pify?keyword=mitsubishi+airtrek+manual+transmission', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be SEO manipulation or user redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://ttraff.club/pify?keyword=mitsubishi+airtrek+manual+transmission In PDF document text
    • https://site-1038992.mozfiles.com/files/1038992/libubumejagad.pdfIn PDF document text
    • https://site-1041614.mozfiles.com/files/1041614/85556259784.pdfIn PDF document text
    • https://site-1040352.mozfiles.com/files/1040352/2772780081.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/51363920647.pdfIn PDF document text
    • https://site-1048200.mozfiles.com/files/1048200/mekikixubososazebugunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87469f8f26f.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/xipigidano.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vexuwubebupejenuv.pdfIn PDF document text
    • https://site-1040277.mozfiles.com/files/1040277/felusemamoro.pdfIn PDF document text
    • https://site-1040298.mozfiles.com/files/1040298/47850589595.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/xigotigumitasinurisotador.pdfIn PDF document text
    • https://site-1043200.mozfiles.com/files/1043200/61142115837.pdfIn PDF document text
    • https://site-1042842.mozfiles.com/files/1042842/examen_ingles_5_primaria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f886e1ca7517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f87f358b99ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f88b2af5021d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f8756e6899e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f88d10f8d74c.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001248b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248B 6148 bytes
SHA-256: 3c6099d182f41e1b116bc278631546b32453ffa27032c8d92ee7b6b2bd6ee28f
font_01_sfnt_off00013991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13991 5016 bytes
SHA-256: 943463b6558c24befab27b375d8d23598b3c6b68227ae7139429bdb3feacacce
font_02_sfnt_off00014a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A72 13220 bytes
SHA-256: eff78194c990f2d71815612eb9b43b111fa7875658cc00bf25acfc534ca05ec3
font_03_sfnt_off00017483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17483 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727
font_04_sfnt_off00018916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18916 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e