Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69b5aa71b80710b…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 05:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05fe9e0aca97078127688f846c8e0b5 SHA-1: 3f1d27f955b2be1d0c5e406c48cc48bb200bb79f SHA-256: a69b5aa71b80710b407b0c367d7e5a3e7291e62c809dd5e9ed318752b5d780a8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as a 'banking awareness quiz' but redirects to a malicious domain (ttraff.ru). This indicates a phishing or social engineering attempt to direct users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=banking+awareness+quiz+pdf+2020
    • http://files.wavingoctopus.com/uploads/1/3/1/3/131381352/1721186.pdf
    • http://files.kirstenangerbauer.com/uploads/1/3/1/3/131384583/ff50e712bf.pdf
    • http://files.amaartllc.com/uploads/1/3/0/7/130775588/fosonatazataxup.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/67043673729.pdf
    • https://cdn.shopify.com/s/files/1/0440/2846/1206/files/27591355906.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/pikarakatokikib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/altura_uterina_en_el_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/ziburatonofoxup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/76086197369.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/nikon_d5100_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/junejumugum.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/nijisedeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/radukoxekigamerebigonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/gixuton.pdf
    • https://cdn.shopify.com/s/files/1/0433/9918/4551/files/official_methods_of_analysis_of_aoac_international_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/tawenunemekulujuvule.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/ranajatilezizoworumorex.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_off00006617.bin
976709ac5f6a9527f19a0aa29b5a49d389205d7d5aee33346c11a522a0c10863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6617 5832 bytes
font_01_sfnt_off00007a20.bin
fd223abb99b9a52b2861bf1d2549890f20c2bd6fb3ba7b1876ae5e72949a936d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 10272 bytes

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