Malicious PDF — malware analysis report

Static analysis result for SHA-256 0394e09f8961056a…

MALICIOUS

PDF

70.6 KB Created: 2020-08-03 03:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f661485d0e01f7bce615c86be578661c SHA-1: 07dde76e0c0c28b3204ed05052b786e7d044b949 SHA-256: 0394e09f8961056afdfcce93d92f15d209b11cf44c84a1fcd28153b26b414ebe
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to 'https://ttraff.com/pify?keyword=list+of+email+domains', identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and references 'wkhtmltopdf', suggesting it's a generated document. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent, likely for phishing or scamming purposes. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=list+of+email+domains
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdf
    • http://files.av8rdas.com/uploads/1/3/2/6/132695525/mosuw-zoser-gevivusavisojog.pdf
    • http://files.ccwestlibrary.com/uploads/1/3/1/4/131406181/napuze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/javascript_browser_detect.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/popijafekapojomexima.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/91702317670.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/tojivadifasawukubiterudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/sql_server_trigger.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/85931337228.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/vmware_workstation_serial_crack_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/87729967093.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/59520131677.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/jizabovepifotow.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://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_off0000a853.bin
bd09df638a03b27a1c7717789b2667a005a5987accd776884575b89dd44ce97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA853 4688 bytes
font_01_sfnt_off0000b81f.bin
463512b094a9d740fa299f214eeabf004c11b2886a7681d40848dcf168a9166e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB81F 15832 bytes
font_02_sfnt_off0000e9d3.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 16164 bytes
font_03_sfnt_off0000fee8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE8 4324 bytes

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