Malicious PDF — malware analysis report

Static analysis result for SHA-256 1064008058e53cbf…

MALICIOUS

PDF

41.4 KB Created: 2020-10-30 21:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba8097e29567144c5e1b591a6662fc45 SHA-1: d831dc8f3e5f9de6edb91b8b3813648998c2503e SHA-256: 1064008058e53cbf8d9f79d70a8cfa4e8df34c838a73126d0f60934ca72e3e82
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=peter+deadman+manual+of+acupuncture+free+download In PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/2107023.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/lixifewixise_matos_xerobazajim_bulafovadujig.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/donitijolime-bimosabapasuz.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/9c560a.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/vegimatigujofes_nuxewijebe_rifodemisuri_gitelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cb096d-2d1f-44b7-8db3-7e2cfbad0723/advanced_word_family_lists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbe267d-2ab1-4724-a6b1-687093a829e5/wifazixexomet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5816/6435/files/tv_player_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/plus_two_ncert_biology_textbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/aristotle_s_theory_of_poetry_and_fine_art.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0802/2436/files/64255487153.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/fox_finance_associate_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975c1771-9a4b-4095-bee1-4f5bc953cd54/66802968601.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_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5216 bytes
SHA-256: b275c3ea78f671cc9712eb284f7514b68eb753cf8f813636bdaec8fc78e62132
font_01_sfnt_off000074cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 10380 bytes
SHA-256: 2a07d2ae7c38a702195faf01cee5869d32b66fa037983c0bdd6970375e256c78

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