Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e97304011d9a8ec…

MALICIOUS

PDF

48.0 KB Created: 2020-09-01 12:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a23ac6fcb3b4a8fa70c47e5a09b04671 SHA-1: 4c7b6ac28f93391762399961da089b784a7c9853 SHA-256: 0e97304011d9a8ec85dfcd06e0835ac62528762a49ee078287b6054218f4858a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to host external PDFs. One of these links, https://ttraff.cc/wix?keyword=chitrangada+dance+drama+songs, is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to drive traffic to malicious infrastructure.

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/wix?keyword=chitrangada+dance+drama+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/jpop_flac.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/79168006310.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/common_media_queries.pdf
    • https://cdn.shopify.com/s/files/1/0432/6378/7170/files/4498508423.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/rogiloxagirasakopowugurel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/48752744207.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/98745768226.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/the_master_algorithm_pedro_domingos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/bauru_de_forno_c_pao_de_forma.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_2ec4a23146844105b5cff94f187a3df8.pdf
    • https://static.usrfiles.com/ugd/b8c837_89c8ccee109b40e9ad89d3b19b6d3d23.pdf
    • https://static.usrfiles.com/ugd/3e9e83_2cc3c9fda7a54072bff90733aad25ccf.pdf
    • https://static.usrfiles.com/ugd/225520_1b0c366c25c44158b4c5c33098c1b1fa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/cambridge_interchange_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/38549805063.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/blood_and_bones_full_movie_free.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.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601d.bin
a9b96cf6ec225bd39141f77d4c0ca3687972db010b9a171118a8a079ea508452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5224 bytes
font_01_sfnt_off000071ac.bin
d90b36bb8983f2c884226c662f93a560f5bbd5caa8d528830122ac5e082aac26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AC 5164 bytes
font_02_sfnt_off00008243.bin
9b27a64b550ddccac556a48b776fa1187b81a548ae42ed787767084734c5afb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 15720 bytes

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