Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c518bd842cd88f1…

MALICIOUS

PDF

99.6 KB Created: 2020-09-18 10:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02feb8bd6f0f33f22ac2b5665d848295 SHA-1: eb0dfe7f95bbf6b7ea5e00c55e88751542e3bae6 SHA-256: 5c518bd842cd88f1b97d9568b1a3cbb63570aca5b33ad62432f374061c956c9e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous external links. The embedded URL 'https://ttraff.ru/wix?keyword=historia+de+moises' is the primary indicator of malicious intent, likely serving as a lure to a malicious site.

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.ru/wix?keyword=historia+de+moises
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/zovisoxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9306/4870/files/treatment_guidelines_clinically_isolated_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/oxford_drugs_in_anaesthesia_and_intensive_care.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1115/files/stoker_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/21966055916.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/junojojokuzedaroriwedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8563/4463/files/antalyaspor_formasi_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/61454797815.pdf
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/auto_tune_efx_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/yookoso_an_invitation_to_contemporar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6815/4278/files/weligepuzejoxibesesam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/75289720954.pdf
    • https://eb028936-bc82-4402-991f-eb118a28cfd3.filesusr.com/ugd/87a178_a46ada07cb75431580992aee516d68aa.pdf?index=true
    • https://99ad7475-28da-4210-b94d-817921c27dc9.filesusr.com/ugd/f35da0_94da14bf11024c0db606d18ff87e2c13.pdf?index=true
    • https://26929620-1949-4838-9821-d4537844c480.filesusr.com/ugd/9f69bd_94ee0f9927d64815a86077922998c74f.pdf?index=true
    • https://983367b1-5fa4-4a2f-a585-8550aea3675d.filesusr.com/ugd/668a47_35a6f862b1f84415a59a4e5c83099407.pdf?index=true
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011246.bin
d840d72f25e303434a822d8196cf74266c910e1253cfc1fe7c0a264c16b116b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 7296 bytes
font_01_sfnt_off000124e4.bin
9725d9e4bee6d9e275750c5837acf9fb609b0144f4aeb564050f48f35f9f9220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 4900 bytes
font_02_sfnt_off00013570.bin
561bec66bb71549fe3796a9a5284963e20562152df8f839f3e76edcc4b8a284a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13570 14948 bytes
font_03_sfnt_off0001666c.bin
baa20ae285618e82ac01b8ac6542862ee2892f8e3f3751c9b0312a46ebceeb8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1666C 17036 bytes

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