Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7a405ed4dde525…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 01:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d5e4c2044368e13438fcc696171a4f SHA-1: 25694267e3960a9eb235aeb451daab5e5c8b0ad9 SHA-256: 7f7a405ed4dde525b3bbb543795f4c4f1a930ad4c399096157c0e4b6de1f3908
140 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=undated+cheque+full+form'. Additionally, a medium heuristic flagged a callback phishing lure, indicating the document may prompt users to call a number for fraudulent purposes. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.com/pify?keyword=undated+cheque+full+form
    • http://files.cynthiadiggs.com/uploads/1/3/1/4/131409090/fb0091d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/63679223264.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8518/files/19828116628.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/voziwawobupozobak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/free_caterpillar_service_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/fowevikoguzanadujonipejip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/37305260696.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/zefepumad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0758/files/59523616965.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/backup_android_apps_apk.pdf
    • https://cdn.shopify.com/s/files/1/0446/2054/6211/files/keputabijawekukevofogodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/44411371462.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/43720128341.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/vacina_antirrbica_humana.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/migufaguzikuteteremo.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_off000067f1.bin
ffba633e23ebe74dff2dda172ea1b0c1849456765356b19486a49484f3b961e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F1 5200 bytes
font_01_sfnt_off00007973.bin
de4bf7fb0472762131017b49615e2c0f9884fe1660c8b51ddf8332652a6a67da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 10516 bytes