Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ecb9213685e6f5…

MALICIOUS

PDF

53.1 KB Created: 2020-08-12 12:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86d57c88a61cb23ea7dc8a4e403c3d9d SHA-1: 290d6ae78f2269b8c4c3b8b6e53641f04f4f1c6c SHA-256: 87ecb9213685e6f5b44205bee9dc3344de63a4d7a80864575c38066f20d19a1d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also contains a heuristic for a 'secret recovery lure', indicating a phishing attempt. The presence of numerous links to Shopify-hosted PDFs suggests a link farm for SEO poisoning, aiming to attract users searching for specific documents.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=asme+section+viii+radiography+acceptance+criteria+pdf
    • http://files.seasidehomedesign.com/uploads/1/3/0/7/130775983/loxido.pdf
    • http://zeparuga.sallyjaneheit.com/uploads/1/3/1/3/131398140/b76a72b51a08c36.pdf
    • http://files.villageyogayogi.com/uploads/1/3/0/7/130775768/kokegomeludabefokar.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/febovevimupuboripurin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1212/files/42121507387.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/vernier_calipers_reading_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8182/files/11419170802.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/46487633509.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/resezigosuguzokotu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/nitrate_powder_7_days_to_die.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/blood_brain_barrier_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/16589443898.pdf
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/33384738744.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/93142717663.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/95360753033.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/zasadubedupebika.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_off00008edc.bin
53b417cf7f342ac77f81eb9dc2972943bf744942229a770f4f4f28ac99e0cb11
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDC 5688 bytes
font_01_sfnt_off0000a20a.bin
e6feb8261f2690b24b67bd6661bc61f3f0ee482ca535d28da313fde74010aa51
pdf-font-stream PDF embedded font (sfnt) at offset 0xA20A 10772 bytes