Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fa7969d9676152…

MALICIOUS

PDF

49.0 KB Created: 2020-10-28 03:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62e2cd9a3edd47dfc305471178b22f0e SHA-1: 9e00da4da8b386f514826028e3d9b4058ff50c4b SHA-256: 18fa7969d967615288cb6e903580f637196ffd4e6f1aaf79a89cb70c7b1ad77d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=davivienda+costa+rica+empleo'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Weebly. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the primary purpose is to redirect users to potentially harmful content.

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://cctraff.ru/123?keyword=davivienda+costa+rica+empleo
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/pimut.pdf
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/5ef07c25ec89c5b.pdf
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/1ad77.pdf
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/bemona_gumakivakizag_komusaviji_fepadevepu.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/4f7ab62d8ac5f.pdf
    • https://gabumisuxenumu.weebly.com/uploads/1/3/4/3/134366459/sixinejopelaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dotivaf/kukiruwonulof.pdf
    • https://s3.amazonaws.com/fosagobomap/agile_scrum_handbook.pdf
    • https://s3.amazonaws.com/rexogeguxosix/66357180415.pdf
    • https://s3.amazonaws.com/lixuzo/6653643494.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/xalurujivikusiralejoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0469/8534/files/games_like_hitman_reborn_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0494/7237/2903/files/tuwilejemovotijosijaz.pdf
    • https://cdn.shopify.com/s/files/1/0502/7994/0296/files/hungry_shark_world_elmas_hilesi_apk_indir.pdf
    • https://cdn.shopify.com/s/files/1/0500/2441/5382/files/binal.pdf
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/ace_knee_support_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0478/0136/8735/files/xusexixud.pdf
    • https://cdn.shopify.com/s/files/1/0502/7073/2456/files/rogers_television_guide_ottawa.pdf
    • https://cdn.shopify.com/s/files/1/0266/8232/7221/files/73475275390.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/cheetah_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/tizuz.pdf
    • https://cdn.shopify.com/s/files/1/0482/4891/4081/files/veworaduduteduw.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_off000074e2.bin
3a6aeef5f4d75e3a13bdd2b486af82a439f5ef14bc1955c1a6497c39a5c187f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 5276 bytes
font_01_sfnt_off000086bf.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BF 3720 bytes
font_02_sfnt_off00009222.bin
c575e016e97f0dd24a986cc309630bc9b15d1d9f8ec3c7ff038fb3ceba75900d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9222 10452 bytes

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