Malicious PDF — malware analysis report

Static analysis result for SHA-256 4634c14847a394d2…

MALICIOUS

PDF

47.1 KB Created: 2020-08-03 16:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d223746d612906c08f1be87ad5d81e1 SHA-1: e5d3c8c2404d28c4b55d3c69f9686ad257a9e983 SHA-256: 4634c14847a394d293e1e02b3b106348c9cf1cab339f4ef1a590cb95f64de4d2
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bahaya+asap+rokok+pdf'. The document body, though heavily obfuscated, contains the same URL and references 'wkhtmltopdf', suggesting it was generated by a tool to create a deceptive PDF. The presence of a link farm further supports the malicious intent of directing users to potentially harmful content.

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=bahaya+asap+rokok+pdf
    • http://files.darcythomasdo.com/uploads/1/3/2/6/132681783/nurekesubepelodaza.pdf
    • http://files.dog-gone-running.com/uploads/1/3/0/8/130874266/6564663.pdf
    • http://zigox.andydoveyphotography.com/uploads/1/3/0/7/130775607/6598882.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/mark_henry_s_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/safusaromafanisimedij.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/44636127749.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/call_center_agent_script.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/41160565048.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/82372889183.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/50502519950.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/43700247854.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/6393738393.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/kaxirenit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.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_off00007b53.bin
87f10767cbafe958bf2e37d4e244d60284f7dd6cc2b1a569f1d9c6ecf1561700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 5312 bytes
font_01_sfnt_off00008d65.bin
9c95e3b7d380816533feeeb2838d3644c1ee622831725c3c22c19193b226d36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 10208 bytes

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