Malicious PDF — malware analysis report

Static analysis result for SHA-256 718333b824d5c073…

MALICIOUS

PDF

53.9 KB Created: 2020-08-17 05:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f252fb84f2f2a3b79def93b65a3eccf9 SHA-1: 16f2fde949bd8d178af4764c97eb4239d31e5d33 SHA-256: 718333b824d5c073ff4728c599fe064925913015bc6dce607e24d41e282eb73f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, many of which point to a link farm infrastructure designed to redirect users to malicious sites. One prominent URL, 'https://ttraff.ru/pify?keyword=bbc+reporter+nick+robinson', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=bbc+reporter+nick+robinson
    • http://files.thesterlingcastle.com/uploads/1/3/0/7/130775998/lewebuwu-datufewejupu-ligumu.pdf
    • http://files.zionhillcentralia.org/uploads/1/3/0/9/130969768/8231118.pdf
    • http://panezemu.breastfeedingmybaby.com/uploads/1/3/0/7/130776394/keder.pdf
    • http://files.willemwillems.com/uploads/1/3/1/4/131407315/gaket_lufuvejopo_fufarowitifife_zobosotim.pdf
    • http://widubinu.nationalscholarfoundation.org/uploads/1/3/2/8/132814930/1963648.pdf
    • https:////https:////https
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/28401703939.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/46291140714.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/roxakufigepufodujup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0116/6498/files/96025409172.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/30018096024.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3240/files/beburig.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/spatial_data_and_their_management_in_gis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/refitapobofubogiwimubik.pdf
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/20391000496.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2949/files/dakimugajadub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/wujel.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/waffle_iron_reviews_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0434/5023/7085/files/gezodojetofa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000969d.bin
cce17d1e3c538c4831516837af66e7948b22da0fe0266f02907dd8f33f01296a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969D 4940 bytes
font_01_sfnt_off0000a772.bin
8e328b0c0df20dc0cd3e6b2073fb593760cfc509b77317823828c932f7ded3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA772 10120 bytes

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