Malicious PDF — malware analysis report

Static analysis result for SHA-256 513d8d70b521d8f8…

MALICIOUS

PDF

41.2 KB Created: 2020-09-01 05:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e000e16a26b2385b5bb686a61c24ee5c SHA-1: 8efb1abe7a19824b5b409e00c9be07b545715700 SHA-256: 513d8d70b521d8f8216c9bd219b67e5ed8fba6dbff0087a6cfb10235e51ce318
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.cc. The document body, though heavily obfuscated, also contains this URL, suggesting a social engineering lure related to '3d video song free'. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a likely attempt to lead the user to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=3d+video+song++free
    • https://static.usrfiles.com/ugd/b8c837_dfc587d6c35a4f17877ed0369fc95c21.pdf
    • https://static.usrfiles.com/ugd/37428b_a3b16ec1b73d40daaf5012d767da8605.pdf
    • https://static.usrfiles.com/ugd/0c268c_7876d90a117c48318593b55913e71af7.pdf
    • https://static.usrfiles.com/ugd/34ec99_d38105c10f2e4be5a6addc7d5f200917.pdf
    • https://cdn.shopify.com/s/files/1/0438/5459/4213/files/mogivuvojupunidibeso.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/storm_front_bl2.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/sekedomiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0906/files/chinnari_chinnari_chiluka_naa_video_song.pdf
    • https://static.usrfiles.com/ugd/d94ae5_7bc18ebf545c449d9dd7cc3d0bea08f4.pdf
    • https://static.usrfiles.com/ugd/934fc3_6e93497a78f045c1ba4fc7d84fd27330.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_off00006583.bin
258975986699fa41a62f5ec5f5906564b0b130e1fc4fbb1b3b6ced32f85a6e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6583 4964 bytes
font_01_sfnt_off00007681.bin
e473e9f831df2d1bf99a61f9026b614fa6f76e3f3c9875085ccbec2ba43c71b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 10016 bytes

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