Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50555b02f3fb581…

MALICIOUS

PDF

38.4 KB Created: 2020-08-07 11:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48d70f79b15a2b39b5f4e5b01a8a5550 SHA-1: c3b2d6a61c0aaf3724e696cfb6aade1f28797487 SHA-256: d50555b02f3fb581669f6670159812d9695e4ebf71610c6ec1522f8de6896b2f
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning tactic to distribute malicious content. The presence of a 'download button' heuristic further supports the lure of downloading content. The document body, though partially corrupted, contains text related to 'healthy food worksheets for grade 2' and the malicious URL, indicating a deceptive lure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=healthy%20food%20worksheets%20for%20grade%202
    • http://files.shop.perros.ch/uploads/1/3/1/4/131408970/4f411b3.pdf
    • http://files.satindollsbundles.com/uploads/1/3/1/3/131383548/wijepu.pdf
    • http://nopawoxa.pureblissbodyconfections.com/uploads/1/3/1/4/131437792/62d49ba7dde.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/ferijegisarifomedasadale.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/memory_allocation_methods_in_os.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/54074507925.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/civil_technical_aptitude_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/clinical_chemistry_tests.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/wuzarojatuxedeju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/wusotaten.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://cdn.shopify.com/s/files/1/0450/5973/5704/files/internet_of_things_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/vuniwudurez.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/95373279411.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_off0000584a.bin
16478a514eed219232fdaa2f73efd0b592483465a907ac7f079a3f202c558d7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x584A 5520 bytes
font_01_sfnt_off00006b23.bin
ab9d6de5268db858aa54dc4aa2cd6e046b6f7608c5bf11b1610d8a1a1cf3dab4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 9924 bytes