Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0d36a04c6c09b5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-16 19:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b494769804f1d37ce2dca125bdcb8abf SHA-1: dd62305f2f0bf2a7f6b7e841fca5287c168697d9 SHA-256: cb0d36a04c6c09b5ee9ab427764cfb2c308099be0cca22320464bff76b4ac0f7
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though heavily corrupted, contains the URL 'https://ttraff.com/pify?keyword=avg+cleaner+mod+apk', which is also flagged as a malicious redirector. This suggests the document is designed to trick users into clicking the link, likely leading to malware download or a phishing page.

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.com/pify?keyword=avg+cleaner+mod+apk
    • http://pesoxaxa.salishfysprt.org/uploads/1/3/0/7/130775085/6703957.pdf
    • http://xidulad.pumpkinandsprout.co.uk/uploads/1/3/1/6/131636612/483ff.pdf
    • http://files.en-linea.com/uploads/1/3/0/8/130813325/816cff711.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/fowivanikejejapepalifosu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/15722364142.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/3065158934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0074/9467/files/experimento_bobina_de_tesla.pdf
    • https://cdn.shopify.com/s/files/1/0458/6579/5737/files/black_eyed_peas_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/honda_cbr_150r_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/jipanumesifori.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/85100727910.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/tecnicas_de_asepsia_y_antisepsia_quirurgica.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_off00006887.bin
679a075601132dc57aaaf5bd883d09ba29d74fd62be19fe9342c8610f280a479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 5328 bytes
font_01_sfnt_off00007a96.bin
027ff5b61552c917cdc6e6fb5538c6adf51db79a97ce6b2f79ca844463bc3433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 10520 bytes

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