Malicious PDF — malware analysis report

Static analysis result for SHA-256 5779e70cbb40dbf8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 22:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c24961a9d5fdd451374325d11f796ca SHA-1: 32da7415a3bd288f926694b63607659fa117a2c0 SHA-256: 5779e70cbb40dbf8ba4afab9c84cad604ee61845243c5c85296d7547fa245308
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=my+tata+sky+app+for+pc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The presence of these elements suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=my+tata+sky+app+for+pc
    • http://futalelo.vreist-slimportfolio.com/uploads/1/3/1/6/131637881/fisanulom-lobaz-balixepav.pdf
    • http://files.azeyemds.org/uploads/1/3/0/8/130814475/7278359.pdf
    • http://gadid.shearserenitysalon.net/uploads/1/3/0/9/130969723/suluzepir.pdf
    • http://files.fellowshipburford.com/uploads/1/3/0/9/130969850/fipebo_tufesonure_zitujinero_netego.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/95686900690.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/norumog.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/fisagagugagafamejutak.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/vizuzemavupanulijagebe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/clear_entities_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/17427702700.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/adobe_x_pro_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/adobe_reader_pro_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/arte_de_la_prudencia_baltasar_gracin.pdf
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/fire_arson_investigation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/70704251967.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/zewerufati.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_off00006540.bin
d663234abe5b691265e1f2ce91af019b1f3947e2057c474f99e774c42c5ec590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 5148 bytes
font_01_sfnt_off000076e4.bin
4fcc81f186d723bfcbddd47d2ce36f0e25d46c22b6a52d14945b5727e6d05831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 10208 bytes

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