Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1df665d0f57f628…

MALICIOUS

PDF

50.1 KB Created: 2020-08-24 08:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59e65262fdaf88cc9d94b4ca8b6f5a04 SHA-1: 14a49343f3b48491a518052ea5d955b6a066eed0 SHA-256: b1df665d0f57f628de3c45d20815aea34c7a9d93bc2bbfe909cc9bc2fe7b0f3a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and references to a 'king iso autophobia album free', suggesting a lure. The presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious links broadly.

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=king+iso+autophobia+album+free
    • http://tinofagi.pinkpapayasblog.com/uploads/1/3/2/7/132710567/9d548d2.pdf
    • http://files.northeastwisconsinwelding.com/uploads/1/3/0/9/130969045/183539eec5ac.pdf
    • http://files.majesty-on-cloud9.com/uploads/1/3/1/6/131636890/b444d33.pdf
    • http://files.cochranetotaltree.com/uploads/1/3/2/6/132681409/8e17de7364fda.pdf
    • http://files.dekalbtennessee.com/uploads/1/3/2/7/132740424/a4863c3039c.pdf
    • https://cdn.shopify.com/s/files/1/0459/2707/1911/files/xiaomi_mi_9_se_update_android_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/1287/4662/files/atomistique_exercice.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/77785111089.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/77412062241.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/vumipilawotiraburesamobif.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/90466579652.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2267/files/zenekoresuvedodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/algebra_2_workbook_answers_slader.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/j_stars_victory_ps4_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/8371083331.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/duzexuwodugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3331/9831/files/appointment_letter_format_for_engineering_college.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/punctuation_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/tta_mi_myanmar_unicode_font_apk.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_off000083e0.bin
2e92c6810ac03f19094f5ff60534fb7b36dd2eb5aa063dcd0f18a9f756658f1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E0 5424 bytes
font_01_sfnt_off0000962f.bin
282cb54378748c2bbf6fb7bcc6aca916006476f717c7b6c9f07686119f89a0b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x962F 10824 bytes