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)
MD5: 0e2df0860603e6b473d5dc8213cad8d7 SHA-1: 72227e1d854c505f2250d714820c03784d8e4d84 SHA-256: 5d15ffaa45cb45263afe211790ba248bf8b3842dd57720ddf5cadd985cdb63b2
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be SEO spam or link farm infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains a title related to document conversion and includes the primary malicious URL, suggesting a lure for potentially harmful content or phishing.

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.
  • 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
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://files.julieannejonmichael.com/uploads/1/3/0/7/130739173/2426f436ebd9c.pdf
    • http://files.jensensiaw.com/uploads/1/3/1/3/131398367/3a5c5d870ba7.pdf
    • http://files.micaelablei.com/uploads/1/3/0/7/130775983/bilobozor-xofepebap-rodupisonagiles-bajezimudokedi.pdf
    • http://files.maggieabril.com/uploads/1/3/1/6/131606550/nevujuzojunod.pdf
    • http://files.stephaniejanaina.com/uploads/1/3/0/8/130874495/kovizobulobatet.pdf
    • http://files.northernbugwear.ca/uploads/1/3/1/4/131407165/modofuda-tevuravikat-xejaduve-xewuzedalupus.pdf
    • http://files.ellemieke.com/uploads/1/3/1/3/131384583/vewovufamaterilir.pdf
    • http://files.wlu-science-chem-halabadleh.ca/uploads/1/3/1/3/131398177/8b04c.pdf
    • http://files.sanchezartgallery.com/uploads/1/3/2/8/132814272/linenijasobesolebane.pdf
    • http://files.waterlilyskin.com/uploads/1/3/1/3/131380720/jegejuvamo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vorosatigeb.files.wordpress.com/2020/06/tufewagajex.pdf
    • https://zowebowuxelu171742964.files.wordpress.com/2020/06/53306439766.pdf
    • https://jexosatija.files.wordpress.com/2020/06/motubonewefoji.pdf
    • https://gowunexinelo.files.wordpress.com/2020/06/fomakagugibakowejax.pdf
    • https://bageredo.files.wordpress.com/2020/06/58951216947.pdf
    • https://giwegepolefo.files.wordpress.com/2020/07/zebadagifexafir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jomanumono.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693c.bin
1a55a29761f2252685098f4b2122306bc91d7fb10b930911369affc4727cffd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693C 5144 bytes
font_01_sfnt_off00007a97.bin
cca68676f7ce56d155d75cd3ac8aa7c678c62d617a4c96321e087c3270d88e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A97 10284 bytes

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