Malicious PDF — malware analysis report

Static analysis result for SHA-256 f149fbdfe3503da5…

MALICIOUS

PDF

43.8 KB Created: 2020-09-03 01:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3d88f25949ad7eaad820cca8f584f2 SHA-1: 5ed2691beeec7e9162d2cd2f5fe5ae68d1e5bb1a SHA-256: f149fbdfe3503da5985c37c888b1438f7a49061d59bf0c80a2b46a7ec5319ab2
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=anaconda+2+tamil+movie+full+hd'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=anaconda+2+tamil+movie+full+hd
    • http://bytlly.com/1d1jd6Us
    • https://cdn.shopify.com/s/files/1/0462/7903/2992/files/dorofelaworapotelemimer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/5256429464.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/cation_exchange_capacity.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/17714781190.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/categories_for_the_working_mathematician_download.pdf
    • https://static.usrfiles.com/ugd/516793_0923f974f2c94e51b8149a6c7ea83ff7.pdf
    • https://static.usrfiles.com/ugd/eda9ba_cd7224a38a31476e91e0bf6cb8bf53c4.pdf
    • https://static.usrfiles.com/ugd/d5415a_30992ccea5e847e9a29e310bfcade25f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a705fc8c45247af96f67a23a6bb725b.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_off0000614a.bin
a10f6ecb89a5d908a345c7105e2ed4093d601cba97c108b1de219a44833bf806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 5052 bytes
font_01_sfnt_off0000724e.bin
d50c5a54fce91d234f812e18478e2dc3b639f9bef2a738f8ad51e06ae21f5ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 10040 bytes
font_02_sfnt_off000094ba.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 4324 bytes

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