Malicious PDF — malware analysis report

Static analysis result for SHA-256 959ab5f4701221ce…

MALICIOUS

PDF

67.8 KB Created: 2020-08-12 00:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dc7a9e5c18a28c93f9331f876ca25b9 SHA-1: 0ef42eacc8016bf366d81569653c5cd47692ec8b SHA-256: 959ab5f4701221cefc57d4191628bd4b6fdb2a3be20269a9f1e9ab05385d357b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=structure+of+zika+virus+pdf'. This indicates an attempt to trick users into downloading further content or visiting a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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=structure+of+zika+virus+pdf
    • http://dawag.feistyandalivemommy.com/uploads/1/3/1/3/131381204/juxiguw_pazared.pdf
    • http://files.donandmargieabroard.com/uploads/1/3/1/0/131071076/f2b818fc74ed0.pdf
    • http://files.deenasaundersgreen.com/uploads/1/3/1/3/131379639/bipibarotogali.pdf
    • http://files.surrealvalecity.com/uploads/1/3/0/7/130776757/2d8f7.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/18526525395.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/82306528524.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/parekukazigapabetexametur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/duguvedugelawulasafotum.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/46802329557.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/number_in_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/fanejadamexerularutim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/39023633857.pdf
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/46509487769.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/akuntansi_pemerintahan.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/negative_binomial_model.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_off0000cba4.bin
a12b02c4310f9a81ebb53f227200bc63fb5e9c160e11666c93aec22df1ef18e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA4 5396 bytes
font_01_sfnt_off0000de1b.bin
0fc8803c85cbf11edcdf8ed2f45a3b0d3c49dd8021061e6de4443b4ccc0d6d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 10456 bytes

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