Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cf8493a7aae157…

MALICIOUS

PDF

37.1 KB Created: 2020-08-25 09:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eee9988426753195f413f232cf04688f SHA-1: bf53753077adde23e635ac191ccf88e2972a0804 SHA-256: c2cf8493a7aae1576a6bb244e3a633ee1aa4edb9591af0e4f3f2e0a015b26260
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.cc/pify?keyword=talisman+online+uopilot+free, which is likely used to redirect the user to a further malicious destination. The document body contains garbled text but includes the lure 'Talisman online uopilot free' and the malicious URL.

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=talisman+online+uopilot+free
    • http://files.kidsfunreads.com/uploads/1/3/1/8/131871692/lariguxu-gutiro-mofomojapu.pdf
    • http://xavokugis.all-the-world-a-stage.com/uploads/1/3/1/6/131606069/wibakajen_tixifin_zogutosizawu.pdf
    • http://files.carolineheffernanactor.com/uploads/1/3/0/7/130775434/399d119ba5e.pdf
    • http://files.gandmam.com/uploads/1/3/2/3/132303019/topobanaziliti-giloneli.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/zefuwewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0058/files/friendship_songs_in_tamil_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/42280058325.pdf
    • https://cdn.shopify.com/s/files/1/0446/6094/9155/files/alternative_dispute_resolution_robeniol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/sirakapipozixatevusibud.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/estimating_products_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/vimofatorikigijidiromusow.pdf
    • https://cdn.shopify.com/s/files/1/0432/3154/3463/files/oxford_dictionary_for_java_mobile_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/57421723657.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5300/files/kovanovufuzifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/16000202345.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_off000046dc.bin
9be17e4e17bf89bdae32dd151ce5c3a561335b5271333dab79da13095294c880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DC 4996 bytes
font_01_sfnt_off000057c0.bin
883abf4c73504b728f714a3e5cc45957f13e611013ff21e5c2b2d63555780347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C0 9472 bytes
font_02_sfnt_off0000781c.bin
4ed3a3ccf4c9be320d00119979a701fe787e6d203e0dc076c13db6f913287dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781C 6152 bytes

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