Malicious PDF — malware analysis report

Static analysis result for SHA-256 7339f57c64ab7935…

MALICIOUS

PDF

53.9 KB Created: 2020-07-28 02:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f5aaec14f639b2a4bfc9c31297b007 SHA-1: ade419ebc339baec2f19317a87b8799bf055374d SHA-256: 7339f57c64ab79353c2da86f193495b5da9d199019057a09d40ad1f4523c596b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a link farm, indicating a phishing or malicious content distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lead the user to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/pify?keyword=vibrant+group+ltd+annual+report
    • http://files.lambdogdoodles.com/uploads/1/3/1/3/131380728/1c52e6c.pdf
    • http://files.mwri.co/uploads/1/3/2/6/132695694/bavowes_losexet_nijowepotuju.pdf
    • http://files.markchristophergarrett.com/uploads/1/3/1/1/131163931/5856514.pdf
    • http://files.dianastem.com/uploads/1/3/1/3/131380998/9567351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/30369195434.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/vibumupilotisa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/penekavetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/pejivelavigafovodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/baxijis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/rubisadowuzavapirujifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/91969576395.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/zibukevexepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/85875953036.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6140/files/82022472294.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/90211235414.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/41984620226.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.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_off000086f9.bin
c54bf23773bf53089427c747f0531082fad1f3ad15abc04abb5915f91d39f9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F9 4936 bytes
font_01_sfnt_off000097c2.bin
efc7af7334272d63a494d877d334018f6a99274887d067dc69e55ca1f697dc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C2 15504 bytes

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