Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fed2297b94d77d6…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 11:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0de00fe66e6d9cb6ff24653f521e482 SHA-1: 135c100db4f33a9f7cda7d5446aa7b07bed19580 SHA-256: 5fed2297b94d77d6c80cde244098e158d3e912023c82467eb4963f719de6d342
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'adjectives and adverbs lesson plan pdf', which is likely a pretext to drive users to the malicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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.com/pify?keyword=adjectives+and+adverbs+lesson+plan+pdf
    • http://files.jc-engineering-solutions.com/uploads/1/3/2/6/132682106/mixosiwe.pdf
    • http://files.lelouvrecake.com/uploads/1/3/0/7/130775606/69e83a7cc6.pdf
    • http://wizogasew.smokefreeottawa.com/uploads/1/3/1/4/131437363/wamiwoxeriwuz_jufefudulali_borufe_sofuwit.pdf
    • http://jitak.heartlandchurchnetwork.org/uploads/1/3/2/8/132815367/kopoxop-zodemukamarura-xovugibatizal-soratakasel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/poxukagez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/historia_de_la_bandera_de_mxico.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/30938350830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/61744950129.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/xalar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/13417751769.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6933/files/91840114979.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/wabukabipazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/70747939273.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/figeperoleza.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7974/files/ubuntu_deb_command.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/furoxase.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/webazinasidenibefoxen.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_off00006047.bin
bf4abfb7296d1712cac36a3e741c472e5b84bc43c9f2c2f22a5d15cbce5e68c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6047 5412 bytes
font_01_sfnt_off000072ca.bin
feef1bfceebe90dfbb1d3b24c16e5bb386e202fe019aff8c7a1e182a8f3ecb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 10100 bytes

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