Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9ae88a3e9b25c8…

MALICIOUS

PDF

45.7 KB Created: 2020-08-23 08:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48ff520ea30a60ced16dce69d2bb4737 SHA-1: 159f34b0234ef02f2558ed22974d26f34c8e32c9 SHA-256: ec9ae88a3e9b25c8f9e5a2073d0259d7c6690989093e7df7f3c1ec5f7bb3191a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=95+catechism+questions+and+answers'. The document body also contains this URL and numerous other URLs hosted on cdn.shopify.com, suggesting a link farm designed to redirect users to various external sites, potentially for malicious purposes. No scripts were extracted from this sample.

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.ru/pify?keyword=95+catechism+questions+and+answers
    • http://naxepi.pebbleptso.org/uploads/1/3/0/8/130814017/79aa6214f19d8.pdf
    • https://cdn.shopify.com/s/files/1/0450/1300/8534/files/java_tutorial_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/waste_management_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/foo_fighters_wheels.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/funepuvakepego.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/34951811463.pdf
    • https://cdn.shopify.com/s/files/1/0428/0241/3735/files/quick_calculus_a_self_teaching_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/american_english_file_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/rezazijawemomufevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/zadoruwidoguwedifaforod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/bayes_theorem_proof.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0213/files/nefago.pdf
    • https://cdn.shopify.com/s/files/1/0436/0300/1502/files/all_star_chorale_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/evinrude_etec_problems.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_off000066f6.bin
3705528654c613bff08c862f1260e4ae268b195a11a3c7d3b45b0afc062cd1f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 5432 bytes
font_01_sfnt_off00007945.bin
7a2f0547678f4eb49624dc3132757214622d6223ffa3056d8642b0d391bd1b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 10056 bytes
font_02_sfnt_off00009b91.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B91 4324 bytes