Malicious PDF — malware analysis report

Static analysis result for SHA-256 375d1566ab910e8a…

MALICIOUS

PDF

69.7 KB Created: 2020-08-11 13:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22ba8808319f5cf705d4834eda2960dd SHA-1: 430b895bd435df801978498fabe672e0aefacd63 SHA-256: 375d1566ab910e8a0ee324b60b735aa566595491f067bb9d778d986521fdfcae
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=arifureta+light+novel+volume+3+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to what appear to be benign Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack vector appears to be luring users to malicious infrastructure via embedded links.

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=arifureta+light+novel+volume+3+pdf
    • http://files.ratingsguru.net/uploads/1/3/2/6/132681460/d2213d68ffb40.pdf
    • http://nalupe.rocmrrc.com/uploads/1/3/1/3/131379678/7204060.pdf
    • http://novedo.toris-pinkribbonjourney.co.uk/uploads/1/3/2/6/132696111/489945e.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/direct_tv_rebate_forms.pdf
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/14624978968.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/29170590846.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/kunufakulobakasovosoduxot.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/9th_grade_algebra_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/body_beast_workout_sheets_improved.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/naturally_occurring_toxins_in_food.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/pananibufujetoxot.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/felodediniloguxenaludowir.pdf
    • https://cdn.shopify.com/s/files/1/0437/1746/0120/files/how_to_combine_files_and_rearrange_pages.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/paradiso_perduto_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/56226069961.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/77776658036.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_off0000bd06.bin
93bc2d6789c379e2d604bbe4f9bf573c0b0ae5d01389b1f59295c1836d7eaa72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD06 6372 bytes
font_01_sfnt_off0000d2ec.bin
6a81bbf04266c136b3ab33afefd3a7a07afc9986cfcdbd400dd7245cd031842b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 5488 bytes
font_02_sfnt_off0000e574.bin
e2a0e06bf576835b090726108bae50558f643373554743c931aac05d4f60d0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 10432 bytes

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