Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd87efd71cad61a9…

MALICIOUS

PDF

38.8 KB Created: 2020-08-04 00:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad7cf02b45fe2f6593b2fd6f0352333 SHA-1: fc544b209bffe96271157819076ba20fb3f47214 SHA-256: cd87efd71cad61a92e9c6a8c901a144dfa295bded34f88e4a8b7f8586a80a1c6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to lure the user to a harmful site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=catia+electrical+harness+design+training+pdf
    • http://files.kauwai.com/uploads/1/3/1/1/131163540/tikajun_fukuru.pdf
    • http://files.misophoniablog.com/uploads/1/3/0/8/130813736/8581064.pdf
    • http://files.phisterequipment.com/uploads/1/3/1/8/131871477/19448ad.pdf
    • http://files.tahlequahtrails.org/uploads/1/3/0/8/130874086/1607821.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/biology_cbse_class_12_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/38411039283.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/74711740217.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/pearson_precalculus_textbook_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/45442184577.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/mivusuxefikolutixeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/zetutoganemire.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/7386882938.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/mulidowoxubufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/18597195534.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/zofejevabesukafekozim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/liperabukasusilerinop.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/wavosomarokewevitebukezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/gumivufedobokatit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/microsoft_project_portable.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_off00005950.bin
d4e233094aa1c461814bd5be8c89a02696d9f44ccc7e2ce64b0cd1ac905448ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x5950 5320 bytes
font_01_sfnt_off00006b5f.bin
e1f1cf93331787f1730f040263a2b33a698d9fbe9f37dab1793db24285107fc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 10164 bytes