Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71b27641477c304…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 00:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f4ab76412ff0181a28e44ddd28e3db SHA-1: 58804f9e2a28a797ff11e85af0761ff400f5f59d SHA-256: e71b27641477c304913c13dda3b9bfe10c0f42f0d44480ebe032203fa3fccc27
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a callback phishing lure, prompting users to call a number for support or billing issues. It also embeds a link to a known malicious redirector, ttraff.ru, which likely leads to further malicious content. The file also functions as a link farm, pointing to numerous other PDFs hosted on Shopify, some of which are confirmed benign but others are unknown. The presence of the malicious redirector and the callback lure strongly suggests a phishing or social engineering attack.

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.ru/pify?keyword=ultrasound+guided+axillary+lymph+node+biopsy+cpt
    • http://bobusu.collegiatelearningcenter.com/uploads/1/3/0/8/130814328/1166496.pdf
    • http://natam.juliebalzer.com/uploads/1/3/1/4/131408024/kuzisoze-wewufewoso-julixajixa-savavako.pdf
    • http://didefafeb.msdooleysscienceclass.com/uploads/1/3/1/1/131164250/bexojoj_josuzulewoto.pdf
    • http://xesafunu.lorraine-lopez.com/uploads/1/3/0/9/130969754/5444380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/corgi_tire_machines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/financial_budget_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/african_cattle_breeds.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/61745624476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/parunakepanugulevojosep.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/act_not_working_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/sezimakamiselivaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/57716873518.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/musiwumelaroribaribuwisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/66974297240.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_off00006741.bin
0d06941fa203b190b17e894a6fd1f4c8785deb978668d1503fe008679e82aebb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6741 5788 bytes
font_01_sfnt_off00007ac2.bin
80968ca2a52291bbad682213ab4790636646f1429a5757525600f7947acd72ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 10712 bytes