Malicious PDF — malware analysis report

Static analysis result for SHA-256 87270b497eec317c…

MALICIOUS

PDF

42.8 KB Created: 2020-07-09 12:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9257568d40ee49047031316e6decd99c SHA-1: 210ac4fd47a70e548e7ec1802eb6f0cabd1753f9 SHA-256: 87270b497eec317c666a7aeff9ae65e65fca22bbe6e9a651e3e7b7f9c5771982
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body text and embedded URLs suggest a lure related to password-protecting PDFs, aiming to trick users into clicking the malicious link. The presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content.

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.
  • 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
  • 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.com/wb?keyword=password%20protect%20pdf%20without%20adobe%20reader
    • http://files.xtratouchexpo.com/uploads/1/3/1/4/131483154/vijobufubajowete.pdf
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdf
    • http://files.healthnotwealth.co.uk/uploads/1/3/0/8/130874495/8ea4984.pdf
    • http://files.moesoap.com/uploads/1/3/2/3/132302999/cf6696aef6.pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.speedybraids.com/uploads/1/3/1/1/131164314/baduxo.pdf
    • http://files.thefilamentstudio.com/uploads/1/3/1/6/131606035/fakesijerisaz.pdf
    • http://files.learnerstogether.com/uploads/1/3/0/8/130874175/bezitojiritukup.pdf
    • https://levejijuw.files.wordpress.com/2020/07/51813077585.pdf
    • https://gakirebeb.files.wordpress.com/2020/06/somuxunupod.pdf
    • https://lupevuver.files.wordpress.com/2020/06/guvowusog.pdf
    • https://mudopepomof.files.wordpress.com/2020/06/32519525182.pdf
    • https://parujekotazi.files.wordpress.com/2020/06/90465825254.pdf
    • https://fexodil.files.wordpress.com/2020/07/riwenezajulituxumiwoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ad.bin
98ffc08a818db96e26a010b287d856d6c1f9eacbffe8068e1539d9739d6b486d
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 5220 bytes
font_01_sfnt_off00007a8d.bin
222ae0de88d45f3eb9117c078553b652ed456dd3fbdd74cbaed2eec5c3d64ac9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 10404 bytes