Malicious PDF — malware analysis report

Static analysis result for SHA-256 00147d6a957ee04f…

MALICIOUS

PDF

40.5 KB Created: 2020-09-02 08:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c41b988eaba3621d68534cf3a6fbfe0 SHA-1: bc4d9d128e05b6c14a90b3711844a364bcb729cd SHA-256: 00147d6a957ee04f89d8183dbd977b57ca66d9c2e4c7530a9583cc4b6178bc1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=bistro+boheme+michelin+guide', indicating a malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=bistro+boheme+michelin+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/paw_patrol_para_colorear.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/dulekenamiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/blog_del_fotografo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/muguburiti.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/bufaxafuzuzabib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6762/7928/files/16254723415.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/xepozozofowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1373/files/bootstrapping_a_nonparametric_approach_to_statistical_inference.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/simple_business_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/saderuvabizolixofesigew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/2790101186.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/screenshot_ui_elements_unity.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/nero_9_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/gibesibipugumov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/google_suggestions_api.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7702/files/waniwuwofutusibukovugir.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_off00005877.bin
4d13a59a98608aa21fbb25c5ab9dd39947296150b4379efc399d163dc50b5848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5877 5332 bytes
font_01_sfnt_off00006a6f.bin
c0f810b42664de0684a24dd53f7733217bfcb67cb72bfa802df2afe9a4aa02e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 13804 bytes

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