Malicious PDF — malware analysis report

Static analysis result for SHA-256 344a17418c947ae7…

MALICIOUS

PDF

55.6 KB Created: 2020-10-25 16:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 28400a78a8a5d131f4ab2e92ba6d21f8 SHA-1: babbbeb925e870800c9077569ea3ba02e1c5b167 SHA-256: 344a17418c947ae70de999fe46a56fe4effa40fa6673c03da5356461602eff0b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for an Android app download. The ML classifier also strongly flagged this PDF as malicious. The embedded link likely leads to a second-stage payload or phishing page.

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/123?keyword=song+editing+app+for+android+download In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/burug-juxen-retigigada-morup.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f872e7ae4930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f8cb0e83b13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f8f14fbdb98f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8dcb015223c.pdfIn PDF document text
    • https://juregirezixo.weebly.com/uploads/1/3/4/4/134401856/4499485.pdfIn PDF document text
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/2120691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/17333078080.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/90058973170.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/black_codes_and_jim_crow_laws.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fool_me_once.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/59182837863.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/38805646392.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/28297319480.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/fagomin.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/499515698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3293d2f8-1317-4228-9cc8-169f20a52726/52656485411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fa21ba-c19f-4719-b8e4-b2f1bfdc9433/xerutajeguxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a693f41b-d0d9-4c34-ad41-418b434faf43/raxerogorujifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d1b46d-6fc2-40fe-af04-3d0fc8763791/zasesex.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_off000097cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CB 5228 bytes
SHA-256: 526caae1956c53101064bfc341a833a8d47b1ac0616a1096bb7bf7811b5e6659
font_01_sfnt_off0000a9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B1 11516 bytes
SHA-256: a56d9a2039212743277ad923da95ba5e4804a014cdff51002e8169fb71d17196

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