Malicious PDF — malware analysis report

Static analysis result for SHA-256 651dfebe276f2e04…

MALICIOUS

PDF

43.4 KB Created: 2020-08-17 04:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dca583743fa1ca362a618524397c8088 SHA-1: 5484304c03f521297d4a10ae4e52cb5088a81d8a SHA-256: 651dfebe276f2e04221e832ab565b566242911cb833d258c49e32b2920465be3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/pify?keyword=huawei+p30+pro+camera+review+android+authority, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, indicating its likely purpose is to redirect users to malicious infrastructure.

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.ru/pify?keyword=huawei+p30+pro+camera+review+android+authority
    • http://files.maritimereunion64.com/uploads/1/3/0/7/130740073/nezudil_belar_gitogete_zipalopoku.pdf
    • http://nemov.lyrictheatreillinois.com/uploads/1/3/0/7/130775248/2955983.pdf
    • http://files.slimshaynee-gaming.com/uploads/1/3/2/6/132682327/mapejokedu.pdf
    • http://mufumi.ichea.net/uploads/1/3/2/8/132814718/4982a43a57b.pdf
    • http://files.baapt.org/uploads/1/3/2/6/132681030/1c3b55d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/kipasunigujoson.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/67400778737.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/a._l._p._h._a_tome_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/17802284915.pdf
    • https://cdn.shopify.com/s/files/1/0448/3910/8770/files/nelatijavekepixivixa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/motonizokujefusilaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/67024189997.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/didoletasekafakizetevena.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/88710153009.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/22954394091.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/46804293799.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9142/files/kawepobolifamidudaseg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/26874650251.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_off00006adf.bin
41b8009baa726e9825850dcdc213c677b5145d908db5ae08b632dbb581ed7156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADF 5624 bytes
font_01_sfnt_off00007de6.bin
29f1857c225f9f42abbc4dbb2a4668f117a1554a9b83fe5dacce9600a3cc1135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 10020 bytes

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