Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af40aa91f9accd…

MALICIOUS

PDF

45.3 KB Created: 2020-08-02 22:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b455cb829af0dc20b0743633d9a7397e SHA-1: e89a00556aee52519a78021071053496c08f6278 SHA-256: 67af40aa91f9accdabaf6b91f8dbad39e90be56ef752f90ed994bee0aa0e72d0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Plymouth driving test' and includes the malicious URL, suggesting a lure for phishing or spam. The presence of numerous Shopify-hosted PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.cc/pify?keyword=plymouth+driving+test
    • http://files.pureclassgeelong.com.au/uploads/1/3/2/6/132681342/mokaj_xanakagixa.pdf
    • http://files.mrmrswanderlust.com/uploads/1/3/1/6/131606652/jizeriveves_lagaduzi_zonumadefap_voxonusenujusu.pdf
    • http://files.rozeefashion.com/uploads/1/3/1/3/131384024/doxigusufali_nazire_kojafo_feloterixaxon.pdf
    • http://files.theputback.net/uploads/1/3/2/6/132680860/xuvedamegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/lojetunotibajuraje.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/40795501278.pdf
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/risulemupifizabab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/66300578459.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2092/files/drop_column_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/segolimubemivigunazofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/joxutuzevabun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/16114025821.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/fofozod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/pabazefenemobovozuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/44686141553.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/pefaxivirojaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.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_off00006abf.bin
2f931e18195432f236aa5cdc57731b48315bb79b8e9a17291e5b87b8ac9b4ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 5192 bytes
font_01_sfnt_off00007c4c.bin
d277f38d7d34c7639ab6189b52038f51a7a3ee0b91c3c104982cbc8906f19e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 14052 bytes

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