Malicious PDF — malware analysis report

Static analysis result for SHA-256 49453e2f98acc7f2…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 19:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dad4e046c85437228bbc2271f6bdd2 SHA-1: d2292835c4b3ba20cfa5d255564ffa1b665d4b80 SHA-256: 49453e2f98acc7f20fb2ecba2e8f33008ce01bed954751e10160f54650fe0c3c
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, suggests a lure related to 'balance de comprobacion pdf'. The presence of a malicious redirector indicates an attempt to deliver a secondary payload or lead the user to a phishing site. No scripts were extracted from this sample.

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=ejemplos+de+balance+de+comprobacion+pdf
    • http://kuvaz.thedoosra.net/uploads/1/3/0/7/130776106/vofoba_pesati.pdf
    • http://files.wrestlingdoneright.com/uploads/1/3/2/8/132814168/mazowixipiz-rafile.pdf
    • http://files.ucclatrobe.org/uploads/1/3/0/7/130776749/9717431.pdf
    • http://files.brightwatersbeverage.com/uploads/1/3/0/7/130739180/872857.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/zuvavemimevevid.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/isotonico_hipertonico_e_hipotonico.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/59192882979.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/strategic_cash_flow_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/24993854587.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3586/files/newuvukoso.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/viwapibefuzikin.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/gufivese.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/20221499973.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/solib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/88100501660.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_off00006408.bin
bdcee185ed947b84174d8a3d76cf1161240477d51d61d5da04fd607a3862bfe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 5472 bytes
font_01_sfnt_off0000768c.bin
5fa789fe90ecd70e87c4d8f897630d30bb08afe3a0067fa9610669a451a6ac08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 10288 bytes

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