Malicious PDF — malware analysis report

Static analysis result for SHA-256 888e5ce9af3858d4…

MALICIOUS

PDF

31.7 KB Created: 2020-08-06 05:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657835cd9baf3dccb4a5d3ecf1e92461 SHA-1: 54035adc473cd77ebd350d9d685cd9b499503fec SHA-256: 888e5ce9af3858d47e4f44a281a0f2a7b78ef0d0f0eb95808a3e94e5be09faf1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=strength+of+materials+solved+problems+pdf'. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The document body text also contains the same URL, reinforcing this attack pattern.

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.cc/pify?keyword=strength+of+materials+solved+problems+pdf
    • http://files.artflockstudio.com/uploads/1/3/1/4/131455832/7ad4613eaf.pdf
    • http://novake.campverdecommunitychurch.org/uploads/1/3/1/4/131454549/f934e4.pdf
    • http://files.dianeetatumwriter.com/uploads/1/3/1/3/131380728/lusuniveguguzixo.pdf
    • http://files.maggiewatkinsdoula.com/uploads/1/3/0/8/130813991/376082.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/29667124547.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/julubado.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/87262234600.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/muloxexufatabupuvojuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/70532102850.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/38444968656.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/26482239798.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/70449012634.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/muxugigolilinol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/57446007398.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/guerra_del_canal_de_suez.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_off00004198.bin
68bd512543af26fbecb2274d98ccbea81dc910fe2ea7f15fb7616d77b0640ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4198 5760 bytes
font_01_sfnt_off0000550a.bin
f10021b3348b599badfe306039ad0a5d4719e2bab5881b9ed9f50f870c9a2d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550A 8596 bytes

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