Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cec54d626e000c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-12 15:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b0d8a1f98239d9ce76ad0b91ea4f777 SHA-1: 3f0d84a3f701e714bb82cdf4aee89da36c96de5e SHA-256: 77cec54d626e000caf4ede2f56500e7c6222da5b85314e57700a2ee054e6243f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One prominent malicious redirector URL is https://ttraff.cc/pify?keyword=urticaria+idiop%25C3%25A1tica+cr%25C3%25B3nica+pdf, which likely leads to further malicious content. The document body itself contains garbled text and what appears to be metadata, suggesting it's not intended for human consumption but rather to host the malicious links. The presence of numerous PDF links and a malicious redirector indicates a phishing or malware distribution attempt.

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=urticaria+idiop%25C3%25A1tica+cr%25C3%25B3nica+pdf
    • http://fivesal.t300.org/uploads/1/3/0/8/130874493/5065415.pdf
    • http://files.stmaryslee.org/uploads/1/3/1/4/131437669/9090346.pdf
    • http://mufiv.stochasticcitizenship.org/uploads/1/3/1/4/131406390/8611730.pdf
    • http://dabisuba.rolfharrisisinnocent.com/uploads/1/3/1/6/131606758/ruzubepunudoper.pdf
    • http://files.canvasofthemind.org/uploads/1/3/0/9/130969758/1550142.pdf
    • https://cdn.shopify.com/s/files/1/0440/6712/7446/files/jeminigotitadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/perceptual_maladaptation_mcat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/young_wild_and_free_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/4468389371.pdf
    • https://cdn.shopify.com/s/files/1/0451/5836/7386/files/fobekurometunosib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2801/files/junemaxuluvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/81084385398.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/php_html_template_class_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/9820/9446/files/effect_of_water_pollution_on_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/tumenoxesenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/mojagisijuzi.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_off00007142.bin
17ca7d6707772d6f45d3948bb978212226968b4f8911c1b172675e20e11c1acc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 5300 bytes
font_01_sfnt_off0000827f.bin
00e163b6f2b9a9cd4c11d27b10570ef266e48842dcda3cfae82aea21a2b1f258
pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 10528 bytes