Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cabcd2742b46aa…

MALICIOUS

PDF

46.3 KB Created: 2020-08-09 03:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1480c66ed01d2ee0f82c1e070bda740 SHA-1: ef65d79ae73d39be59e1e55c5fb3793e5429b8bb SHA-256: 71cabcd2742b46aa6714c29af7df832ced969de55daa817d46d27d87940ec7d3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, masquerading as free ebook downloads, with a critical heuristic firing for a malicious redirector. The primary lure URL, 'https://ttraff.cc/pify?keyword=online+ebooks+free+download+pdf', is designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt, likely serving as a lure for further malicious activity.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=online+ebooks+free+download+pdf
    • http://rafote.martinaobrien.com/uploads/1/3/2/6/132683165/pukipebogenoxufaf.pdf
    • http://difiv.sparkd.shop/uploads/1/3/1/4/131453870/d6bb4b7a.pdf
    • http://files.thirdstreetchurchofchrist.org/uploads/1/3/0/7/130775868/defavaxoz.pdf
    • http://files.mogsu.org/uploads/1/3/2/7/132740214/rofurulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/alter_ego_3_tests.pdf
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/career_opportunities_after_10th.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/31469321815.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/tosedesagajomusewu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/15618627221.pdf
    • https://cdn.shopify.com/s/files/1/0434/4158/6332/files/salorazowifipagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/59060743597.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/naxiwepet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/30233375858.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/77945047173.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/pejezokipiravosowidisow.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/wepewifarajedemewilar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f5.bin
67b5d4b426fe870acce54328d46705bd8e3c6d0f646bf2a24b5ce37eeadc3c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F5 5064 bytes
font_01_sfnt_off00007a3d.bin
2f8650c3744869f4853595a528bfa426a4b28867bfd52283a3e33a495c72bc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10524 bytes
font_02_sfnt_off00009e1a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1A 4324 bytes

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