Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3ebf5d53a370fb…

MALICIOUS

PDF

127.1 KB Created: 2020-09-09 19:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c96152d19577803f82e29a1cba0a15ae SHA-1: dc812e91267fe7be02e568d4e496b755d1fb7619 SHA-256: 0d3ebf5d53a370fb62228877ec830bc67e08498c3653e8caf17eab4621dacac5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=cyberbullying%20research%20pdf'. The document body, though heavily obfuscated, appears to contain references to this URL. The presence of a large number of external links suggests a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wb?keyword=cyberbullying%20research%20pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://static.usrfiles.com/ugd/b4a829_2cd2db291318458f9664aadf87270623.pdf
    • https://static.usrfiles.com/ugd/24deb6_08822186a77a4bd28bc962ead73d7fc6.pdf
    • https://static.usrfiles.com/ugd/0d9a50_6f0fab3b74c04c48b7002f428ac16e07.pdf
    • https://static.usrfiles.com/ugd/37321e_653f42299d754a789a0c89eb3e8dffd0.pdf
    • https://static.usrfiles.com/ugd/37987b_48858c33f568446aba485cab3ae949b6.pdf
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/2510377588.pdf
    • https://cdn.shopify.com/s/files/1/0437/8135/7725/files/xovejobawube.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8846/files/bithynia_krall.pdf
    • https://cdn.shopify.com/s/files/1/0434/3988/2402/files/yamaha_rx_v673_manual.pdf
    • https://static.usrfiles.com/ugd/b47706_e5e15aa3411848eb849225db0f12a71e.pdf
    • https://static.usrfiles.com/ugd/9ef0c3_18b26ba7fd95464da0ea84ecb1bc9bf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e205eb3363e2408e819946be9afc4edc.pdf
    • https://static.usrfiles.com/ugd/df7b34_faab6f72888b4656bec06ac3a1dc6234.pdf
    • https://static.usrfiles.com/ugd/ff3115_4774f1d99eb644e5adf12ede8829cfaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/82992076408.pdf
    • https://cdn.shopify.com/s/files/1/0443/4133/0076/files/17_hp_briggs_and_stratton_engine.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/abductive_reasoning_walton.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/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e20.bin
87655c5e249d985a96140cc4360c71409182b63eeefd9d4e5671cbdb724d75e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E20 5564 bytes
font_01_sfnt_off0001b0fa.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0FA 1800 bytes
font_02_sfnt_off0001b97d.bin
0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B97D 6148 bytes
font_03_sfnt_off0001c95d.bin
8cc8cc09ca8db4144007d3e65df5240e9a66c666c40c38157821f2c43f1bb3f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C95D 10876 bytes

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