Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c323525e26bf01…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 15:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4131aa6c9486592530206869c7dfe26b SHA-1: 0218b083543cf955a733f1c76b15c26007bfd73b SHA-256: c1c323525e26bf01a66a612610411d48d5014d63b715cd248df1eeb53dc8d2a7
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, 'https://ttraff.cc/pify?keyword=business+letter+pdf+sample', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to phishing sites or malware downloads. No scripts were extracted, and the document body is heavily obfuscated.

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=business+letter+pdf+sample
    • http://vuxawop.mhhinsurance.com/uploads/1/3/0/8/130874655/nexazoxusalik-tapebejurexes.pdf
    • http://files.itlarts.com/uploads/1/3/0/7/130738484/8a6c57ce6cb.pdf
    • http://files.herbrainchild.com/uploads/1/3/1/3/131384589/2643787.pdf
    • http://files.mrsgreenger.com/uploads/1/3/0/9/130969659/gonelag-kibewofu-keguvaxusatawu-xodotesedoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/72457109701.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/hey_jude_piano_accompaniment.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/fisibidipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/zomagipizipasakofoso.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/understanding_movies_12th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/83618080999.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/rational_numbers_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/48551615891.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tekutuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/40412657139.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/67759557170.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/credit_card_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/0913/9111/files/18657840161.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/
    • https://cdn.shopify.com/s/files/1/0429/0913

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006491.bin
8b178b946e3d91ce97ddea20bdb87d56bf55259e4bd986af94cec2a6d7335891
pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 5236 bytes
font_01_sfnt_off00007642.bin
58730033c7617aed7551a7a5e80d0ec0469919c951d0dbcedc507fd5cd01e6e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 10272 bytes