Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eec40015db3ccc…

MALICIOUS

PDF

56.7 KB Created: 2020-08-02 09:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945c4869a29c75c846ca90b75b8c88e0 SHA-1: db2cb473609b757e286476df5bb065bd94994889 SHA-256: 70eec40015db3ccca56edc0fb2d3355563f36989c148b428f34f30be1caef7df
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=deg+to+rad', which is also flagged as a malicious redirector. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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.com/pify?keyword=deg+to+rad
    • http://files.kingclassictournament.com/uploads/1/3/0/8/130874667/kulixomajitazin_labineti_rikorif.pdf
    • http://files.thelittlegreenkitchencompany.com/uploads/1/3/0/9/130969791/xesikujebawufasu.pdf
    • http://files.loganfamilycenter.org/uploads/1/3/1/0/131071056/dibexaruguvejetulon.pdf
    • http://files.drmichaelcolgan.com/uploads/1/3/0/7/130740193/kigeduvexejebus_vesatugexogenuf_luwewawekoragi.pdf
    • http://files.jaynamcqueen.com/uploads/1/3/0/7/130776499/ziponomomufuwef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/fowiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/jasamojamujuzadon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/17700521796.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/ribebajozonezosuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/wuxixudezod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3931/files/josezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7236632937.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/59080732188.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/furuvozaguz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/73952659351.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/47919713117.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/6949847542.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/33628213819.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000871e.bin
bd4e9e5f4a4646d5dfbdde94f2aca612c2bb7e3c0838250b8ff18f8a626df40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871E 4784 bytes
font_01_sfnt_off00009775.bin
68a9fb61efdb3d2a69c994e0d3af4c790523081a796647928e57a2185d67cfb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9775 11516 bytes
font_02_sfnt_off0000bf09.bin
d6d7ff9336a50038263841063d9a7f26cde16ad5d2d911ae88d9dc826234dbc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF09 16412 bytes

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