Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a96a5e482b5399…

MALICIOUS

PDF

39.1 KB Created: 2020-08-29 16:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d8d199b987224c0e4462a786bfb9261 SHA-1: d24f9289a07651aeb4f76f46df547c8ceaffed93 SHA-256: 01a96a5e482b53996ff2011bddcd0062ac598ad96afd2edded90ae3276efbf41
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a malicious redirector to 'ttraff.com'. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests a link farm or redirection strategy. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure the user to a malicious site.

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.com/wix?keyword=yoshi%2527s+crappy+world
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_99cd530dd41948248b703be9429a89b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1cd72c457554b4f9b85c317d55f7fe5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b8b50b6c65d44b3a894d9dbbbea10e3.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/buku_agama_hindu_kelas_12.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/78360212809.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/823905874.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/wild_magic_chart_5e.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/24611383974.pdf
    • https://static.usrfiles.com/ugd/b8c837_e38f667fcf874eafb195180f138fee3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_312d2b7503a846dc952064edeeabe65f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2aa2de981939428a81fc9bac5c400aeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_60e58ff5224a480da5784657af1b4e42.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd283b680f7540edaa1e482e831b5bc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f3a972375442739521796887dddbbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e629d2fab10a1.pdf
    • https://static.usrfiles.com/ugd/a298ce_ce2c6fca8f914e02adaaa602a9576d1b.pdf
    • https://static.usrfiles.com/ugd/585b1d_cacea4e788674ec4b785f8329506082f.pdf
    • https://static.usrfiles.com/ugd/097bd5_1b04e9f0d1904396a3828df347a99c93.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cf8.bin
f43237fd5939488415c3204a0c3a4e5e7df2140adc009c7cb27490df696c1413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF8 4836 bytes
font_01_sfnt_off00005d84.bin
f301d1e66f9feab4598f90edb9e5c903fb7919a485f6627ee67eb49ddcfcb88a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 10384 bytes
font_02_sfnt_off00008123.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 4324 bytes

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