Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d44e05b23052a8…

MALICIOUS

PDF

36.6 KB Created: 2020-10-29 07:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 870925b192fa92771d18f33adf467015 SHA-1: db8d89fd35b3c4dec923ef4a8da26aa5ed6d6982 SHA-256: 87d44e05b23052a8ae383ce41e492f3ce07893d595f2b4833db28c3744edc97d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that prompts the user to download an APK, disguised as a Minecraft PE download. The document body and heuristics indicate a link farm strategy, with numerous embedded URLs pointing to PDF files, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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://cctraff.ru/pify?keyword=download+apk+minecraft+pe+0.14.0 In 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/1/0481/2731/2035/files/tumilixipulataxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deba6416-da0e-4f2e-988a-6efb4e7ba769/vafepelinitesibuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/frenchtown_elementary_school_montana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6708/0343/files/linksys_wireless_g_pci_adapter_wmp54g_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5057/4239/files/daily_republic_fairfield_ca_crime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec29e1e-dd4a-4648-a866-8b4829588a82/liroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dcc9af0-be2e-4cad-8498-a448fadb0b2d/jivojinerabopazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/gogezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/bhagavad_gita_english_translation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2978/1416/files/comment_developper_application_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8361/5394/files/space_cleaner_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b20608f-b51a-4749-b845-ae008be4001a/zuraxusumomed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2996/2141/files/noxozikijixefuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf9af17-5bec-4e42-8bd2-5e32077c5374/faredigamupulidagoroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/best_fighting_games_android_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7980/6375/files/35304402156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28330e1-7889-47db-a7b2-078e5acfa0e0/83446067996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8974/1974/files/jalavoxir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6466/6533/files/30860603284.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_off00004ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED7 5592 bytes
SHA-256: e9a4d5af3842f43a57881498e5dd248944e061885559ad4da9f5f97d7f37403a
font_01_sfnt_off000061f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 10284 bytes
SHA-256: cc34f1d64753e7fa320470d160cce681910c31bd61f38700c5ce225b6d8c97c9

Open this report in the interactive analyzer, or submit your own file for analysis.