Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bbe2b2c86728ef…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 02:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d54364aef67f73cf133332cceef290e SHA-1: ef57807eb9aff0ec4b5ed8b2c040e588d071955c SHA-256: 53bbe2b2c86728efe3caa61ff369b5c79a77f16137a22676df186624e94a018f
150 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 potentially malicious redirectors or link farms. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user to external, potentially harmful, websites.

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=video+bts+dionysus+dance+practice
    • http://files.buffalohats.com/uploads/1/3/0/9/130969448/30967c.pdf
    • http://lijefun.fcoca.org.uk/uploads/1/3/1/4/131482995/zoxoso-lidepedixex-nigilewubezuwev.pdf
    • http://nujixan.leggolf.com/uploads/1/3/1/4/131412290/5b6e2da7df8399f.pdf
    • http://files.rockhillgallery.com/uploads/1/3/1/4/131483069/vuxixoxusesikofa.pdf
    • http://files.themoundcityslickers.com/uploads/1/3/1/6/131606011/wapobogefofedu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5464/3877/files/folujawefitamosewalisid.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zilitudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/monomial_binomial_trinomial_polynomial.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2168/files/sivebebabelelod.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/27589709770.pdf
    • https://cdn.shopify.com/s/files/1/0461/9373/7886/files/how_to_back_up_images_on_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/67907682197.pdf
    • https://cdn.shopify.com/s/files/1/0437/3892/3169/files/pubiwafegivew.pdf
    • https://cdn.shopify.com/s/files/1/0440/5487/2214/files/kaziniwopuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/tevurameradubotipafuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7145/4883/files/les_adjectifs_numraux_cardinaux_exercices.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005626.bin
39fd9bc99af6c7dd25d9e724ec2c0fa670e803948c9e9d7d9d926678780c7bff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5626 5244 bytes
font_01_sfnt_off00006807.bin
378e83329e092d20d2429a8533d4e29c65db5f348340231e7f8d03a56bce8d61
pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 11084 bytes
font_02_sfnt_off00008d42.bin
a7878227d1c976d3952879c754d3b03e8c48e5b4da4b4dc64bd9a1e47bd7ae77
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D42 16188 bytes