Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd770415ab968a2f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-23 20:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5706dbfdd8524e2bf9029f5197feac SHA-1: 448d07d86800d7a12e4232b52681d1ed4b2f4f07 SHA-256: bd770415ab968a2f52008adb0b93cd465d2c15434f7b65d822e7fcbec847adf1
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to ttraff.com, are likely part of a phishing or malware distribution scheme. The document body contains garbled text but also includes the malicious URL, reinforcing the attack pattern.

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.com/pify?keyword=mahatma+buddha+images
    • http://files.alisonblakewriter.com/uploads/1/3/1/4/131438419/0b15864288b.pdf
    • http://files.paintthetv.com/uploads/1/3/1/1/131164431/budirujumawabaz.pdf
    • http://files.weuniteforautism.com/uploads/1/3/1/6/131637313/18f36.pdf
    • http://jimexuve.oldjohnsrugbyclub.com/uploads/1/3/1/6/131606577/1b7bafa01646e.pdf
    • http://nexej.nohomoprod.com/uploads/1/3/1/4/131406149/7082567.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/free_text_message_template_premiere_pro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/ficha_biopsicosocial_para_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/wozalulakesuzaxotaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/duzerowal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/eritema_txico_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/22543524744.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/62534011879.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/big_ideas_math_blue_workbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/budapoganizivosifib.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/93032716210.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000597a.bin
6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597A 2952 bytes
font_01_sfnt_off00006407.bin
d0fadd7229a4a1d0f55b793b1ad7d41e5dcb69ebc823cc6b6d6e26c465e74dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5256 bytes
font_02_sfnt_off000075c8.bin
4d10ed57bd89188401b022bcdc3f54954fd27c12403d77a482c0b0e54b870aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C8 9820 bytes
font_03_sfnt_off0000976d.bin
01a24d5e9cde49b74996e01b3b2ddb4227d31a323f5523af96068529a3914aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 3944 bytes

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