Malicious PDF — malware analysis report

Static analysis result for SHA-256 a227fa6360e542b6…

MALICIOUS

PDF

46.2 KB Created: 2020-08-31 05:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0882351fcedbaec6501f72114543335c SHA-1: 30de0645573d49940e9dbfa128557a69db197451 SHA-256: a227fa6360e542b6794f1c867e549ad14a217b5c892a2984f1ec1fad96424b11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=printable+barbados+passport+forms'. This URL is embedded within the document body, suggesting a lure to external malicious content. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=printable+barbados+passport+forms
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/38063564998.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/63318797934.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/29606095089.pdf
    • https://cdn.shopify.com/s/files/1/0466/5471/8117/files/excipientes_farmacuticos_e_suas_funes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/18902163158.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/mitedumogef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/zebozovolidejuzivimuzi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2893/0711/files/parquet_format_index.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/local_gauge_invariance.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/noxuromimafofudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/asus_rog_gl552vx_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9627/6128/files/66481997017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/putiwor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/loxumuzelerabosodaxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/xiwinupalarirorov.pdf
    • https://cdn.shopify.com/s/files/1/0446/2706/7043/files/lowes_brice_rd.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/rifoxoguxemokubenisavapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3219/8816/files/etiology_of_bronchial_asthma.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d5.bin
a906b40531cdc8c42398b619055f474ed2da1478d0b5fb0fc6875230d66cb1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 5116 bytes
font_01_sfnt_off00007a0a.bin
f82cc2da0b191aa1e26b7ed2ee52a90ecfc3f680ef944dcef2899f520d3623d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10360 bytes
font_02_sfnt_off00009d77.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D77 4324 bytes

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