Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff3cd32dd2bf64c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-08 05:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b5483cc59f0fce046dffed68853696 SHA-1: 13038571c95834c25fda9809230f922e4bda0f06 SHA-256: dff3cd32dd2bf64c7a40d107aef4d6b6e86abff6cf35bba3747002125c4bccfa
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=bass+guitar+for+dummies+pdf+free', is designed to redirect users to potentially harmful content. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector.

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=bass+guitar+for+dummies+pdf+free
    • http://files.sunnylearning.com/uploads/1/3/1/6/131606127/wexazamibepot_fujosi_kununewim.pdf
    • http://files.mrdeleonardis.com/uploads/1/3/0/9/130969762/e85e6cff7f42.pdf
    • http://files.design-your-self.com/uploads/1/3/0/7/130739269/puxifujimurigul_pizegamare_tatamukupepoj_doxonamolamimig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/biology_keystone_review_packet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/darajaxojevon.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/fokesiwigafusopakejiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/blank_yardage_book_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/40655161205.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/mozagukixene.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/64661238120.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/40475561129.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/speaking_exercises_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/domaxijorilowedegovuzanal.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/xinomewidawebarifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/learning_management_system_tutorial.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_off0000540b.bin
fb3a829abec52f9dc07647bcd5812d715bedb0134a484f5debb8896f02bbae78
pdf-font-stream PDF embedded font (sfnt) at offset 0x540B 5380 bytes
font_01_sfnt_off0000663c.bin
acce913aaab88a144596c14e638593d87985c405534ab36d0d56f165df35ff47
pdf-font-stream PDF embedded font (sfnt) at offset 0x663C 9748 bytes
font_02_sfnt_off000087b1.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B1 16120 bytes