Malicious PDF — malware analysis report

Static analysis result for SHA-256 70400eb1a479f71e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 09:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f08e781f2edfdaf4a03815d8ee29eeb0 SHA-1: d6c61c8b264e6d2ec47110cb989eb2021e03d749 SHA-256: 70400eb1a479f71ee426ded929f1aedd8ab8178298cf1a8558ae8c4cf88e6ef9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com', suggesting a link farm or phishing campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of a malicious redirector and the sheer volume of links indicate an attempt to drive traffic to malicious infrastructure, likely for malware distribution or credential harvesting.

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=faa+far+aim+pdf+download
    • http://files.kelownaplumbingsolutions.com/uploads/1/3/1/3/131398156/vudejinu-kedav-benosagulita.pdf
    • http://files.magnusaircraftinc.com/uploads/1/3/1/3/131380841/juduw_lixobe_fazulo.pdf
    • http://files.cafegratituderecoverystore.com/uploads/1/3/2/7/132741029/3757053.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/gibesibipugumov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/ginuvabakugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/abecedario_para_imprimir_tamao_carta.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/peter_drucker_livros.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/3755333278.pdf
    • https://cdn.shopify.com/s/files/1/0436/4029/1486/files/nc_d-_400_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/types_of_essential_oils_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/59636328863.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/sagefewagipejaretona.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/245986050.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/37602166539.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004946.bin
0e624cad9e018ee6226b188746596e8c4b7a7ee26c5a8ed0e8b8be0fe8e08c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4946 5056 bytes
font_01_sfnt_off00005a76.bin
571f90ee0788b0d1bae53c5d8fc6542821a7d9798e95c63bbd487946f4abccda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A76 9796 bytes
font_02_sfnt_off00007c37.bin
d7dbcefd5a9d087f9dbd48d87e5b82950a900fa0f666d4a1f78598b818f3f613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 16060 bytes

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