Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8957afe484f0a7…

MALICIOUS

PDF

87.3 KB Created: 2020-12-05 22:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e62779f1066b4baa1fa77d4f3ef4f0 SHA-1: 76bb2cd5f89f8477476d991edd4d5168efc0161e SHA-256: bc8957afe484f0a7d5fcada50adeaa541d9d51653693aea1c46e36d5ff8af11f
254 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to a lottery or prize. It contains multiple embedded URLs, including a critical redirector link to 'ggtraff.ru', suggesting an attempt to lead the user to malicious infrastructure. The ML classifier and ClamAV detection further support its malicious nature, indicating it likely serves as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ggtraff.ru/strik?utm_term=soda+can+fizzy+candy+target
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/4213257.pdf
    • https://cdn-cms.f-static.net/uploads/4490739/normal_5fb2d4b67bc68.pdf
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/rujeb_punapefexevit.pdf
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fc554b43e3b9.pdf
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f895a077d099.pdf
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f8b5ac526005.pdf
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5fbadb0ba2e73.pdf
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5fc583ac942da.pdf
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5f9b7d5d591d4.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kogunipigof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0fe012e537a05ef0995e2/t/5fc223f561e25426e1808362/1606558710062/gta_sa_apk_pc.pdf
    • https://s3.amazonaws.com/davubewu/xolebakodaligonavasenud.pdf
    • https://s3.amazonaws.com/satudifin/ion_hair_dye_permanent.pdf
    • https://static1.squarespace.com/static/5fc18b4cdf132613bbc250a7/t/5fc400e8e6d49a06bb0eaca0/1606680808165/95070337515.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_off00011633.bin
860710b31df8efe281afe019348d090d2082699acd6c799c368c7c055138d9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11633 5236 bytes
font_01_sfnt_off00012828.bin
e8237407632a7147b6cfa65a9e8f50f4d9f267c977ff9c940dd5d50b916b57a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12828 12212 bytes

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