Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8ac3ab8fad8970…

MALICIOUS

PDF

55.0 KB Created: 2020-10-10 23:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 020f2c7226a3ee1d35945d17e3ae98b6 SHA-1: ab4ec53719c5967a276f0be7edafe21516a119a8 SHA-256: bf8ac3ab8fad8970d5679f2aba9e05d337adce588c60d8e5efbb31544823ff76
184 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to other PDF files, many hosted on disposable domains. One prominent link, 'https://ttraff.link/pify?keyword=born+a+crime+stories+from+a+south+african+childhood+pdf+download+free', suggests a lure for users searching for specific content, likely leading to malicious downloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's part of a phishing or content-luring campaign.

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://ttraff.link/pify?keyword=born+a+crime+stories+from+a+south+african+childhood+pdf+download+free In PDF document text
    • http://files.elpasomovement.com/uploads/1/3/1/8/131856564/zimapiposubeju_danavewabur.pdfIn PDF document text
    • http://weveti.dianabradfordart.com/uploads/1/3/0/8/130813846/sutulebotutu_barogurabu.pdfIn PDF document text
    • http://files.melissafloresdesigns.com/uploads/1/3/0/8/130814283/pusuxokakizadusirav.pdfIn PDF document text
    • http://files.peggytidwell.com/uploads/1/3/1/4/131438571/7146070.pdfIn PDF document text
    • https://site-1039215.mozfiles.com/files/1039215/31372713429.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/mazavawixelobiwijogikamu.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/newulufulipog.pdfIn PDF document text
    • https://site-1039610.mozfiles.com/files/1039610/57485314729.pdfIn PDF document text
    • https://site-1040312.mozfiles.com/files/1040312/71684895237.pdfIn PDF document text
    • http://files.penniesandpounds.com/uploads/1/3/0/8/130814161/zasirug.pdfIn PDF document text
    • http://files.standrewarvada.org/uploads/1/3/0/8/130814120/sagulukilo-tepoxi-jonidirolez.pdfIn PDF document text
    • http://files.kendrickcowdery.com/uploads/1/3/1/0/131070351/9c9ff.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/1/0478/7181/9942/files/the_p53_gene_and_cancer_student_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/small_head_big_body_cartoon.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_off00008acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACB 5420 bytes
SHA-256: 3d073db18dc03cebf91c440c1cba063dd7c1f235c8670fbe61a404f48c57eac7
font_01_sfnt_off00009d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D12 10192 bytes
SHA-256: d348859ad0e4cbbbe2fbe4504af9222a231a422bb845007afe0cfc1ad658be6d
font_02_sfnt_off0000bff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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