Malicious PDF — malware analysis report

Static analysis result for SHA-256 84212907211a80c3…

MALICIOUS

PDF

54.2 KB Created: 2020-08-05 07:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c0cf58c72f592fd9c4ffcc6cf47222d SHA-1: 1d6c574d01568e0de0313cc4ebbfa248925f7fb5 SHA-256: 84212907211a80c33eb8c3ac0a7ba4aa069401bfb42182cc5c399068108178eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous external links, including a redirector to a known malicious URL. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, potentially for phishing or to download further malware. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=besom+stang+and+sword+pdf
    • http://files.baldwincountybossbabes.com/uploads/1/3/1/0/131070560/64adc4a41968d.pdf
    • http://files.helenwebster.ca/uploads/1/3/1/4/131437457/0961cba2fee60.pdf
    • http://files.runningfatchef.com/uploads/1/3/0/7/130739060/138dd84a25.pdf
    • http://files.loreescience.ca/uploads/1/3/2/7/132710676/470e27c64d86a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/kizusedodulutoxazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/wimoruzufikilakojowe.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/sesunavezevepabofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/95691415262.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/wapabawejaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/tejajumula.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5252/files/29519770387.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/fitelumeduwobarufiliwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/35241761402.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/51945353733.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wepabuvazujebopufopexo.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_off000095d7.bin
09dc1cba7873cda7231e41a2c4ecd7a329b23e7c8c6f715c2127d674b2128c6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D7 5468 bytes
font_01_sfnt_off0000a870.bin
5028b9af68d3f853b7838dd9f5a08229082e4785f9db10f7c3512f40f554b785
pdf-font-stream PDF embedded font (sfnt) at offset 0xA870 10336 bytes