Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd827c4cf478ce00…

MALICIOUS

PDF

47.8 KB Created: 2020-08-12 22:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67bde28f639b8bbe6c687867487cfe7 SHA-1: 8e8c3fa47ab6046a4bb7e4a6cb2ed6dcfbc94f37 SHA-256: fd827c4cf478ce00b1dc4410d3894b9cb336d7f0a07e77ad855da2ee57b132be
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm or redirection scheme. The primary malicious URL identified is https://ttraff.cc/pify?keyword=manual+cultivo+de+arveja+pdf, which is likely used to obscure the final destination of the attack. The document body contains garbled text but includes the same URL, reinforcing its role in the attack. The presence of numerous external links, including several hosted on potentially compromised or malicious domains, indicates a delivery mechanism designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=manual+cultivo+de+arveja+pdf
    • http://xitoxosu.ablepestinc.com/uploads/1/3/0/7/130739590/tatolipukerigu.pdf
    • http://ginalu.apocalypse-party.com/uploads/1/3/2/8/132814930/2dc4a980.pdf
    • http://files.raphastar.com/uploads/1/3/2/7/132712615/tuwumijawebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/huffman_encoding_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/92660297216.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/basic_english_language_learning.pdf
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/precalculus_with_limits_a_graphing_approach.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/85570418739.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/dumopubonate.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/decision_making_and_problem_solving_questions_for_csat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/pdf_to_monochrome.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/waxubomapiziweput.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/76352536126.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/application_format_file.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/96864548665.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/first_world_war_history_in_telugu.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_off00007bb9.bin
bf382f123221f391f937149ea08d90b20d3248a34cf14b1d53e41ba6c0581861
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB9 5112 bytes
font_01_sfnt_off00008d3b.bin
3b636b1f0f2ac78cc10dfd1db781c379fa7324952ee7836febbfb1ec0cb53764
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3B 11504 bytes