Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b8a9d7d68ddea4…

MALICIOUS

PDF

44.8 KB Created: 2020-08-29 02:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec6bde71ddb9bd54dcf5cca112bf8fd SHA-1: 0fa3602ab2d15f48ccec32109a17ef5808235ff9 SHA-256: 50b8a9d7d68ddea46a5bd6c004bb620bf663f719818a8149fb3f0834697b0015
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, suggesting a link farm for SEO manipulation or phishing. The primary malicious URL identified is ttraff.cc, which is known to host redirectors. While many other links point to benign Shopify URLs, the presence of the malicious redirector and the sheer volume of links indicate a malicious intent to lure users to potentially harmful sites.

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/wix?keyword=tehachapi+renewable+transmission+project
    • https://cdn.shopify.com/s/files/1/0466/2686/5317/files/kha_file_khng_cho_copy.pdf
    • https://cdn.shopify.com/s/files/1/0439/1862/2875/files/algebra_substitution_worksheets_year_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buxigol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/nichd_guidelines_for_fetal_monitoring_categories.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/dowolepijokisiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/dd_form_214_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/ritzer_contemporary_sociological_theory.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/naruto_lecture_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/75769415803.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/37822452690.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/prentice_hall_chemistry_2008.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2727/files/template_lnk2019_unresolved_external_symbol.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/biomes_of_north_america_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/2780/6883/files/60564895956.pdf
    • https://cdn.shopify.com/s/files/1/0448/7577/6167/files/guvuzapixitaborepadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/nujinexaruxaxale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.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_off0000716b.bin
95457667242fb98d6f802576e3a5800f4c14b3422d6e37a47ded3c50f82ac213
pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 5428 bytes
font_01_sfnt_off000083bb.bin
c10e0500759c842ef6860e635b99d680f91cecdec56ad607ee87bc9a00778ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 10012 bytes