Malicious PDF — malware analysis report

Static analysis result for SHA-256 7318ed2627414d6d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 05:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b32cad018e948e145bda369e5ca524 SHA-1: 5e5b428aee5a375592e716047cef9a6ca9ae2146 SHA-256: 7318ed2627414d6deb0cbbb040069e98e7fa2d8155318590e9e8acb1262b620a
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, many of which point to a redirector. The document body contains a URL that appears to be part of a link farm or SEO spam campaign. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious content or phishing sites.

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=basanti+chumma+de+dj+song
    • http://lorumi.pineapplefibreart.com/uploads/1/3/1/4/131407552/0ca699c63574d6.pdf
    • http://kurilige.jrkgemsandjewelry.com/uploads/1/3/0/8/130873826/pavewafene_wumowudogofa_manow_tisilizip.pdf
    • http://bepejiwul.everydaysuperhero.co.uk/uploads/1/3/1/4/131452903/govipakuxulutas.pdf
    • http://tevobeve.thereishopeinjesuschrist.org/uploads/1/3/0/7/130739017/0fe8c67df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/ajax_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/19632605243.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/xusanegipebebirak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/49854940563.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/black_sheep_movie_in_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/28977643648.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/siraxuliruritix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/3507880248.pdf
    • https://cdn.shopify.com/s/files/1/0448/4779/2290/files/black_flannel_sheets_twin_xl.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/tuzerare.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_off000052df.bin
acd1acc992d42ac55d8dda07d063e45e9028e5c524a9dcd53025570bc9cfbaff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52DF 5352 bytes
font_01_sfnt_off000064e7.bin
b13ba75e32ba80911eb28dae7eebe2954df4d0df62e517be7dba7ad1308843a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 13244 bytes
font_02_sfnt_off00008e9c.bin
1d332c01bbc243cc1d09b233842c09a346711d6fdba964165be4479ff546d01c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9C 5012 bytes

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