Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab6908c8d411dc4…

MALICIOUS

PDF

41.0 KB Created: 2020-07-10 18:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f03ad9dec85578d0e32fa807973d593e SHA-1: 25854a5dbe1a0a60d074de495f38e756bfe7a688 SHA-256: fab6908c8d411dc427baa67379b6a2e2d84e795494d9124223b085762fb9637e
130 Risk Score

Malware Insights

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

This PDF document contains a high number of embedded links, many of which point to suspicious domains and appear to be part of a link farm designed for SEO manipulation or to redirect users to malicious content. The document body, while containing garbled text, also includes the primary malicious URL and several other PDF download links, suggesting a lure to trick users into downloading further malicious content or visiting phishing sites. The presence of a visual download button heuristic further supports the lure-based attack pattern.

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.ru/wb?keyword=medical%20physiology%20for%20undergraduate%20students%20indu%20khurana%20pdf
    • http://files.leeannphotography.com/uploads/1/3/0/7/130775391/c04b15a81f1.pdf
    • http://files.maureenennsstudioltd.com/uploads/1/3/0/8/130814785/jibuzupure-serizurot.pdf
    • http://files.bacdox.com/uploads/1/3/1/8/131871762/283931.pdf
    • http://files.limmit.org/uploads/1/3/0/7/130739247/jiraw.pdf
    • http://files.romehomelb.com/uploads/1/3/1/4/131438299/2962037.pdf
    • http://files.rocksolidcorporateevents.com/uploads/1/3/1/4/131408153/a6a5edb1.pdf
    • http://files.cbcasheville.org/uploads/1/3/2/6/132683289/misuvogo.pdf
    • http://files.carnoustieclaymores.com/uploads/1/3/2/3/132302999/b1d7d99a7b3.pdf
    • https://wijekiril.files.wordpress.com/2020/06/42782588750.pdf
    • https://sudomabu.files.wordpress.com/2020/07/jabanazerapinujupazigojur.pdf
    • https://vitimatojegi.files.wordpress.com/2020/06/60810236890.pdf
    • https://wibuvevi.files.wordpress.com/2020/06/70214456034.pdf
    • https://powudowipu.files.wordpress.com/2020/07/70632740938.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/kujonukatofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/40895354382.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/fujegedoredofevenuvobi.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_off000061d6.bin
a0f299c331d379e5cd4464764ede7c90fb6857e7f6ab779e44fd47e834793682
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 5468 bytes
font_01_sfnt_off0000746d.bin
79b439275650d9c62044dfd78f77de6ec45f97c740f977160ee086389fa29e13
pdf-font-stream PDF embedded font (sfnt) at offset 0x746D 10064 bytes