Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e91d59da1d28c28…

MALICIOUS

PDF

44.2 KB Created: 2020-08-28 06:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6df1bebd52717f6d53a4621262d216fe SHA-1: cf55f5ebb3ce40ba39f80db8af545732da170c68 SHA-256: 0e91d59da1d28c2838dc8116a3d74cab0dadfaff54b75ad4626aa2813222e81f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a malicious redirector, and another for hosting a large number of external PDF links, suggesting a link farm or distribution mechanism. The embedded URL 'https://ttraff.cc/pify?keyword=life+uncontained+mackenzie+instagram' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other Shopify and custom domain URLs, some of which are flagged as unknown or confirmed benign, but the presence of the malicious redirector is the primary concern.

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=life+uncontained+mackenzie+instagram
    • http://files.kilbrittaingaa.com/uploads/1/3/1/4/131406518/gedadudani_mitomej.pdf
    • http://files.awakenhopeandwellness.ca/uploads/1/3/1/8/131872079/d026dc14846b0.pdf
    • http://files.vontrappflowers.shop/uploads/1/3/0/9/130969434/799077.pdf
    • http://files.britstockfashion.com/uploads/1/3/1/3/131398219/6360585.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/linear_equations_worksheet_year_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0665/files/como_atualizar_versao_android_tv_box.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/the_great_state_icivics_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/95549890666.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/sobotta_anatomy_atlas_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/65960870722.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/28582199623.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/danolivalukupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/govuxibalifabufigan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemopijudesukofareran.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_off00006ed7.bin
5ee0f799d7279cce2eb14d102bbd5077e298b555f480c6a11004f6b75f843c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED7 5364 bytes
font_01_sfnt_off0000810f.bin
e1e594ea4ceb3143c72cd6aff9ec30e4ee065a3510c7935329479df82cdf9b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 10276 bytes

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