Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f5eef8de060977…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 04:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e0a72e824baeec54bdf88dcba804830 SHA-1: d69bd1b86d47d1c3fc4368362d3dc4d9aa6a6c9d SHA-256: 74f5eef8de06097714fec37887cffb7f9c3406faefe5afcba1b50519a8b9834b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be a lure related to a movie title, suggesting a social engineering tactic to encourage clicks. The presence of numerous external PDF links, as flagged by PDF_SEO_LINK_FARM, further supports a malicious intent to distribute content or redirect traffic.

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.club/wix?keyword=american+pie+presents+band+camp+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4061/2262/files/13366162636.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/apache_spark_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/dusapemikitimaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/jifitesazunowar.pdf
    • https://static.usrfiles.com/ugd/856cea_0edfb11da0af4a35a9c8df962aef841b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df26a97b4c64eae930d8ae76ac9163c.pdf
    • https://static.usrfiles.com/ugd/67e251_02f30526a2fe43b79d9afeb0b8b825ac.pdf
    • https://static.usrfiles.com/ugd/73c254_28e47dfff00347cea3d479f8f0517ccc.pdf
    • https://static.usrfiles.com/ugd/c1108c_aa8031d470c849b298f16ead71beff2e.pdf
    • https://static.usrfiles.com/ugd/405339_21ec89d877c541f3a2aeac6a55c8b314.pdf
    • https://static.usrfiles.com/ugd/fd3290_1ac08503a2444084b5eca4058c8704bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_506f562396bf4f09bcbc7d1bd30129cd.pdf
    • https://static.usrfiles.com/ugd/3d0627_62e39a37a60a46479388ca3cbe70cecd.pdf
    • https://static.usrfiles.com/ugd/b8c837_da61417200a94ceba3db15df1b75b394.pdf
    • https://static.usrfiles.com/ugd/74e905_cd68eeb6ca184404b09112f540f4a3c6.pdf
    • https://static.usrfiles.com/ugd/ae059d_35f4e5c8088948b0b1abdf1c1c6f5a3e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fb.bin
4dc6877e03af1d9a8744681652c97c1f145af4a90aec8bd1b88982e4b8fc1946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 5376 bytes
font_01_sfnt_off00007b27.bin
2c6f992ca8a09fa0b0632cc6905aff6f4d9416a510bd23653aa7ca9cb0cbe806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B27 11500 bytes

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