Malicious PDF — malware analysis report

Static analysis result for SHA-256 1183fc2bf2656c42…

MALICIOUS

PDF

35.9 KB Created: 2020-08-21 06:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1bedd338e312ced16f42f7343dc729 SHA-1: dcaef32e9ca4b1a932f0c711cdddb925cc922993 SHA-256: 1183fc2bf2656c4224f5064447b8a18f8f2f6b334b2d34ab101ba2f82b5dc7f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for an advance-fee scam, presenting a fake soundtrack download that redirects to a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this redirection to 'https://ttraff.cc/pify?keyword=another+cinderella+story+soundtrack++zip'. The ML classifier also strongly flagged this document as malicious. The presence of multiple embedded links, many pointing to Shopify domains, suggests a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=another+cinderella+story+soundtrack++zip
    • http://files.shopcedarcreekgallery.com/uploads/1/3/1/4/131453370/775707.pdf
    • http://files.timberlinelearningcenter.com/uploads/1/3/1/4/131452750/280bfd139c90.pdf
    • http://zakabox.extratimeconcierge.com/uploads/1/3/0/7/130775565/fc095a32a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/group_bourdon_test_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/tidovisoxuboboleruzul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7308/4319/files/holy_aura_5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/lizusiwojidogok.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/possessive_adjective_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/nozidop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/metro_exodus_fov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/68527426046.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/72657053306.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/game_beach_head_2002_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/457188.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/18050000984.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_off00004cdd.bin
8d0026d7fbe1a86ab642bae652a35ea6c4256534dd448d95caddf022de4cb6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDD 5364 bytes
font_01_sfnt_off00005f21.bin
47753f59556cdddaac87c56e7f243c7cb34135ae962c7047bdadc177fd29ab6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F21 10420 bytes

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