Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d43d998bb1d6271…

MALICIOUS

PDF

54.6 KB Created: 2020-09-01 05:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67175bcbd91e94810735bcb532ac5ab SHA-1: 5011c48ba2ed21a2576b940280c26bd99a5c7785 SHA-256: 1d43d998bb1d62710b4e3354a043a13b440ebe6c45596d52a63eab077e387277
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a search query for a movie. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify, likely part of a link farm to improve SEO for the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=ananda+bhairavi+malayalam+movie+songs+free
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/huffman_tree_java.pdf
    • https://cdn.shopify.com/s/files/1/0460/4185/8212/files/titanic_full_movie_in_hindi_bolly4u.pdf
    • https://cdn.shopify.com/s/files/1/0446/6386/5507/files/sobedef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/49207640117.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/67720038245.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/30720149422.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/menadifotidobujubelutawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/26994195132.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/8765246937.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/50310659548.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/zadonorerutakolore.pdf
    • https://cdn.shopify.com/s/files/1/0452/5257/5394/files/andhra_bhoomi_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/interactions_collaboration_skills_for_school_professionals_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/jurnal_agama_buddha.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/zavopeke.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_off0000901a.bin
e10185d9bfd43184ad1fc1dd2e30d3a6af4b2047b725fe00d621222ad17abb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901A 5612 bytes
font_01_sfnt_off0000a312.bin
39e26cf7b627767d483d1d1c2b43631ca733bf216f21dd8059678aad7d38f7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA312 13452 bytes

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