Malicious PDF — malware analysis report

Static analysis result for SHA-256 c812ab1f94d2bea3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-28 14:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3e6ece810e9ffab7ce972b502552d1c SHA-1: e2021b7a008c16350dcbf861e0c98bfefee14815 SHA-256: c812ab1f94d2bea3c92dad38efae90798559918837ce3d36d690c82b8ed3fbc4
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a link farm of 15 external PDF links, many hosted on Shopify, suggesting an attempt to obscure the true destination or spread malicious content. The document body also contains text consistent with a callback phishing or tech-support scam lure, asking the user to call a number or click a link for an update. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=56021+coby+kyros+update
    • http://jepuxofiv.visionaryglassarts.com/uploads/1/3/0/8/130814297/492e2.pdf
    • http://files.borrellgolf.com/uploads/1/3/1/3/131398475/miminonikefikur-sepisapubab-remubovenar.pdf
    • http://files.mauriziobongiovanni.com/uploads/1/3/0/8/130813694/3711ac98.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/spreadsheet_application_program.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/47909420595.pdf
    • https://cdn.shopify.com/s/files/1/0465/1152/1942/files/82878890678.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/fovagiwugojegulefokosovez.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/54283012135.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2067/files/java_list_initialization.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/wells_fargo_bank_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0461/7096/4131/files/kisofusaxaxirizesijive.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/84359400654.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/77489496946.pdf
    • https://cdn.shopify.com/s/files/1/0428/7882/8700/files/fake_verizon_bill_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/simif.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_off000066e6.bin
8905215a4c79287b506a25ec1b9a9d922db9d18633e89ed7b2296d2395f98952
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E6 5848 bytes
font_01_sfnt_off00007ad7.bin
3e2510fc99910daf2f273544adb08a5c070596e2f6808c3988811b88e5c5fd44
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 10252 bytes