Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df1378e976ac7ce…

MALICIOUS

PDF

59.6 KB Created: 2020-08-22 13:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2ae4b0cc80d0376cc3f5f817c268234 SHA-1: abd547c4ebeeb81ae4f4ee873733cffd66eaca7f SHA-256: 6df1378e976ac7ce7bfaa671ad223795d9a25b796e4d789886e7a7e41b88b5a6
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is suspicious. The document body, though heavily obfuscated, contains the same suspicious URL. The presence of a password archive lure heuristic suggests the document may be intended to trick users into downloading and decrypting a malicious payload.

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=insurgency+sandstorm+server+guide
    • http://files.tjeffersoncarey.com/uploads/1/3/0/8/130814172/mujoluwaxabewunun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/balancing_chemical_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/rujinejodenabaxexezakeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/marco_de_referencia_arquitectura_empresarial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/puboxokuxokuzudeve.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/transistor_amplifier_types.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9212/files/hemoglobin_a1c_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/nifitagufufusebowis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/dark_souls_2_starting_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/16493664935.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/livazupewodirujibipemazuw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a286.bin
fbdc18eb75775b0c0144f06c966f3950909dd4bda0d7f80ced49c70ca5b215a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA286 5324 bytes
font_01_sfnt_off0000b48b.bin
cce0646806b4a3752461aea7735f702e033cdd10ea5bab694a54b8a2f7f321a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB48B 14624 bytes

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