Malicious PDF — malware analysis report

Static analysis result for SHA-256 912d2570183990f0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 21:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba3f2de8008fa0ef1a9f99a60f8b2e06 SHA-1: b7fcc296b2e4a50325bd10aa6e28013c15e39cad SHA-256: 912d2570183990f05949904bc2c552f1fbb16e77afbca636d07a4e306c805dae
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 acting as a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=newquay+cribbar+surf+report, which is likely used to redirect users to further malicious content. The document body contains garbled text but also includes the identified URLs, suggesting a deliberate attempt to obscure the malicious links within a seemingly innocuous document.

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.ru/pify?keyword=newquay+cribbar+surf+report
    • http://files.kaliberk9.com/uploads/1/3/1/6/131637701/9bec921.pdf
    • http://gegevix.carsonbishoptd.com/uploads/1/3/1/4/131482975/koduvaridiv.pdf
    • http://files.cloverdalebarn.com/uploads/1/3/1/8/131857690/9c9792a4db.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/types_of_artificial_sweeteners.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/tylenol_500mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/gawosamijiwegibugekoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/koriwik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/voruf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/john_deere_155c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/mizolomutezegakuvuwu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/56047486353.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/47338873276.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/narrow_spectrum_antibiotics_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/73437143711.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/ampli_audio.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/8325646922.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eef.bin
d89098a917bde3b69736307df28f82e3c20133ba8e267460794308341f53bf20
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEF 5408 bytes
font_01_sfnt_off0000617f.bin
7b76cfe5c6d3b7ddc1c144f9c884f65b7f3d23a63ea68cb6dd0302528c17ee09
pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 9668 bytes
font_02_sfnt_off000082d6.bin
8d9529fca8e49fd747a132c86257b3f003f6793d9f50918e3e02e184cbe99d44
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D6 16392 bytes