Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ef57117f4fd8c1…

MALICIOUS

PDF

38.8 KB Created: 2020-08-25 08:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4705b6a71168b414d8ce0d3332d3fc SHA-1: cb00470d6d6624b6470270296d984032d0d01e11 SHA-256: 29ef57117f4fd8c1ad545e69389962a8a33923e11a472db47223bafbdf8ecef2
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, many of which are likely part of a link farm. The embedded URL 'https://ttraff.cc/pify?keyword=cheap+linear+guide+system' is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. No scripts were extracted from this sample.

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=cheap+linear+guide+system
    • http://files.ninagrieg.com/uploads/1/3/2/8/132815882/35995.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/peter_roach_phonetics_and_phonology_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/calendario_laboral_2020_madrid_boe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/1717935510.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/40132716110.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/58501555991.pdf
    • https://cdn.shopify.com/s/files/1/0428/3626/3078/files/saxon_algebra_1_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/80994577298.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/b._p._ed_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/35857068141.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_off00005a09.bin
6b96585037106ac9478f3c6b4364d7d095210fbc1860235c58f85dfd6757f67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A09 5380 bytes
font_01_sfnt_off00006c2a.bin
1cf55a08d609e41be9b619b5c63a20a48749d32fb498978e8260a7c689dce74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 10272 bytes

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