Malicious PDF — malware analysis report

Static analysis result for SHA-256 0509c68b6e6a6577…

MALICIOUS

PDF

68.9 KB Created: 2020-08-14 06:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5f967ec7327a9a9d107ae2e1e325479 SHA-1: c546563e7111096b5bdcc2ed5c70c07653f44b4c SHA-256: 0509c68b6e6a6577303cdb0b02e11e33b0875dd38471929439c2808f853e602e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=chudiya+bajau+ki+bajau+kangna+song'. This URL is presented within the document body, disguised as a song title, suggesting a lure to trick users into clicking. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or content-spinning operation. The ML classifier also strongly flagged this PDF as malicious.

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=chudiya+bajau+ki+bajau+kangna+song
    • http://files.debwillardgraphics.com/uploads/1/3/1/1/131164538/jegida_meduputidotow_nepexejuvetabaj_xajulifutojama.pdf
    • http://files.blueberrycreek.ca/uploads/1/3/1/4/131437233/ba53d92.pdf
    • http://files.broadcastfans.ca/uploads/1/3/1/1/131164398/2329131.pdf
    • http://gubevoti.nathanjroberts.com/uploads/1/3/0/8/130813143/kexug_joxutefa_kufanako_zagosajibivid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/sisedejizariga.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/create_prefab_unity.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/b_m_sharma_physics_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/descargar_la_biblia_completa_reina_valera_1960.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/77974058655.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/baptist_distinctives.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/tesufawupuvemifowigatejef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/sagefewupopat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0421/files/8771176393.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/star_wars_battlefront_iii_legacy.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/football_manager_2018_mac_demo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/wusinopagagiwepobiwane.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/61405202572.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_off0000af62.bin
d23a17328848d24fea87e93fbb6577a9c0e927edee47bcc5595c238677eaeb0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF62 5248 bytes
font_01_sfnt_off0000c13e.bin
96756009282d9a023cf4cdd3386083c3b66d375a78bf00f410db814431e7a426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC13E 14996 bytes
font_02_sfnt_off0000efe9.bin
d9da193bed7c81d5c4aa39b9d95fb5d31755c13ce4f935c500840c5ec37de136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 6660 bytes

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