Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d15ffaa45cb4526…

MALICIOUS

PDF

42.7 KB Created: 2020-07-09 22:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 0e2df0860603e6b473d5dc8213cad8d7 SHA-1: 72227e1d854c505f2250d714820c03784d8e4d84 SHA-256: 5d15ffaa45cb45263afe211790ba248bf8b3842dd57720ddf5cadd985cdb63b2
192 Risk Score

Malware Insights

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

The PDF contains a large number of links to external PDF files hosted on disposable domains, indicating a link farm or SEO poisoning attempt. One of the primary links redirects to known malicious infrastructure. The presence of a 'download button' heuristic further suggests a deceptive user interaction is intended. The document body, though partially corrupted, contains text related to document conversion and a URL that matches the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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://ttraff.cc/wb?keyword=cara%20merubah%20dokumen%20word%20ke%20pdf In PDF document text
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdfIn PDF document text
    • http://files.julieannejonmichael.com/uploads/1/3/0/7/130739173/2426f436ebd9c.pdfIn PDF document text
    • http://files.jensensiaw.com/uploads/1/3/1/3/131398367/3a5c5d870ba7.pdfIn PDF document text
    • http://files.micaelablei.com/uploads/1/3/0/7/130775983/bilobozor-xofepebap-rodupisonagiles-bajezimudokedi.pdfIn PDF document text
    • http://files.maggieabril.com/uploads/1/3/1/6/131606550/nevujuzojunod.pdfIn PDF document text
    • http://files.stephaniejanaina.com/uploads/1/3/0/8/130874495/kovizobulobatet.pdfIn PDF document text
    • http://files.northernbugwear.ca/uploads/1/3/1/4/131407165/modofuda-tevuravikat-xejaduve-xewuzedalupus.pdfIn PDF document text
    • http://files.ellemieke.com/uploads/1/3/1/3/131384583/vewovufamaterilir.pdfIn PDF document text
    • http://files.wlu-science-chem-halabadleh.ca/uploads/1/3/1/3/131398177/8b04c.pdfIn PDF document text
    • http://files.sanchezartgallery.com/uploads/1/3/2/8/132814272/linenijasobesolebane.pdfIn PDF document text
    • http://files.waterlilyskin.com/uploads/1/3/1/3/131380720/jegejuvamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vorosatigeb.files.wordpress.com/2020/06/tufewagajex.pdfIn PDF document text
    • https://zowebowuxelu171742964.files.wordpress.com/2020/06/53306439766.pdfIn PDF document text
    • https://jexosatija.files.wordpress.com/2020/06/motubonewefoji.pdfIn PDF document text
    • https://gowunexinelo.files.wordpress.com/2020/06/fomakagugibakowejax.pdfIn PDF document text
    • https://bageredo.files.wordpress.com/2020/06/58951216947.pdfIn PDF document text
    • https://giwegepolefo.files.wordpress.com/2020/07/zebadagifexafir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jomanumono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.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_off0000693c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693C 5144 bytes
SHA-256: 1a55a29761f2252685098f4b2122306bc91d7fb10b930911369affc4727cffd7
font_01_sfnt_off00007a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 10284 bytes
SHA-256: cca68676f7ce56d155d75cd3ac8aa7c678c62d617a4c96321e087c3270d88e69