Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cbaca4e75fa23a…

MALICIOUS

PDF

50.4 KB Created: 2020-08-04 05:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052a801e5dc0a593bd0e07ff6503a2a5 SHA-1: 92ef5344f9051490df39df37d2470474047be603 SHA-256: 56cbaca4e75fa23a49ab785f6f783375560442af81e92f9027802edcac667028
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including one pointing to `ttraff.ru`, suggests a malicious intent, possibly for SEO manipulation or to lead users to harmful sites. 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=cations+and+anions+test+pdf
    • http://files.foodwebfarms.com/uploads/1/3/1/6/131637056/d2b32f67ae74.pdf
    • http://files.gogginslonestarfarms.com/uploads/1/3/0/8/130814601/xiderudokomo.pdf
    • http://files.elitegolfcartrentals.com/uploads/1/3/0/7/130739991/35bc77b74347ae.pdf
    • http://files.wildlyhuman.com/uploads/1/3/2/8/132814155/pitufosekim-pojepejepupe-zatop-levex.pdf
    • http://files.kevinmaillard.com/uploads/1/3/0/9/130969633/3555956.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/pepifagegawut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/2316855777.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/fefadonuwine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/jepodakagefukixuremek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/roxuwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/musulevuridafagorugulaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/65468990994.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/fatajojufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/sofinirifixuwikini.pdf
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/declaracion_de_busqueda_activa_de_empleo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/6052497836.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/tugetoginojoguxubuwa.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_off0000889a.bin
a13bc173bb89f89a5c5940101eacd1b98788db4ea1beda6c9ca7d98fbd3cd852
pdf-font-stream PDF embedded font (sfnt) at offset 0x889A 4812 bytes
font_01_sfnt_off00009909.bin
477f448e030bee2c5fc5f928b50bcb6f8b4f9cf988729d1a887d0d18a4ed42b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9909 10400 bytes