Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0ddf70bcb2c345…

MALICIOUS

PDF

46.1 KB Created: 2020-08-04 02:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 264dc7989968a1af364f8c208d47af07 SHA-1: 6e37d1fbd1a8240654f9c3230adfe4d3f048c080 SHA-256: dc0ddf70bcb2c3450adb47b3df77a15291630bca7513982badfed43c183fad81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a redirector to a known malicious domain (ttraff.cc). The document body, though malformed, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=definicion+de+cualidades+fisicas+pdf
    • http://purejuzu.rossimachineryservices.com/uploads/1/3/1/3/131382274/wonogupuzekomedivax.pdf
    • http://files.turningpointbaptistchurch.org/uploads/1/3/1/3/131398504/rusaliwife-gupenu-duzan.pdf
    • http://files.torringtondems.com/uploads/1/3/1/8/131856646/ximadadijavaxel_rajaju_vijofe_pesitox.pdf
    • http://files.jobsopportunitiesenterprise.org/uploads/1/3/2/7/132712209/9659852.pdf
    • http://files.fremontrose.com/uploads/1/3/1/4/131437380/befovu-sediji-figemazo-gogenuvisopafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/nagixelopixeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/zitenejevuxos.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3698/files/mivijojopafixozedin.pdf
    • https://cdn.shopify.com/s/files/1/0436/8387/2921/files/30134049940.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/fekaxetenok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/75376006523.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/7628247584.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/kisezimev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/java_cash_register_program.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/70683167887.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/xedimitekotaxapenemido.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006649.bin
5c13956174320f58bab7b3c4641716d5470d90f97da535fb1703e19b2c75d0ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 4852 bytes
font_01_sfnt_off000076da.bin
ea594352c452d45994dfa00a1e3cbf8a3c51ba2340b6d43ecacf05877cb9eb27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 11204 bytes
font_02_sfnt_off00009b3e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3E 4324 bytes

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