Malicious PDF — malware analysis report

Static analysis result for SHA-256 2466a7710d8709ba…

MALICIOUS

PDF

46.2 KB Created: 2020-08-22 00:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae1339f5e1d8fd03987d15a4ab5e59c SHA-1: 53185e3b6704f087dc526a90f368c43c1aa37dfe SHA-256: 2466a7710d8709baf2f6866b2a4c887eee3341509600157c024702667d860a65
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique commonly used for phishing or malware distribution. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL pointing to a redirector, further supporting this assessment. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=libro+alferez+real+pdf
    • http://files.membraneemulsification.com/uploads/1/3/1/4/131405948/2025006.pdf
    • http://kefagemul.chrisenrightfinewoodworking.com/uploads/1/3/0/7/130739017/xaxadukonaka.pdf
    • http://files.hopeforhappy.com/uploads/1/3/1/4/131409794/9535626.pdf
    • https://cdn.shopify.com/s/files/1/0431/2131/1898/files/39323772610.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/9030891066.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/bhajana_songs_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/jisis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/26343654724.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/juvof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/wanarobikun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/factors_affecting_biodegradation.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/d_nealian_cursive_handwriting_worksheets_printable.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/biguse.pdf
    • https://cdn.shopify.com/s/files/1/0440/6942/1206/files/65690484708.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/3d_bluebeam_autocad.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_off000077f8.bin
2079a42ecd8bfd1325f8f15aab8a50a119c2f921ca80ae184d3799d7d66391dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 4988 bytes
font_01_sfnt_off00008901.bin
61f428a110c5cadb5a283389ddf85508079b88190e320a2ce79878238fbfbc38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8901 10392 bytes

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