Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa7ad64c04dabed…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 16:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066ef2497d8ddde10c59891f1eae3bef SHA-1: 63601d3fba5181cb6db3d96b42bdcd485fa1fba3 SHA-256: 0fa7ad64c04dabedcf3055cf0b055b8091d4bc9312ad6fb34b193972107dc842
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.me/wix?keyword=eldritch+blast+dnd+5e. While no scripts were extracted, the PDF structure and embedded links strongly indicate a social engineering attempt to lead users to potentially harmful content. The presence of numerous Shopify links, some flagged as benign, serves to obscure the malicious redirector.

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.me/wix?keyword=eldritch+blast+dnd+5e
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/37437459750.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4802/files/32579712262.pdf
    • https://cdn.shopify.com/s/files/1/0436/0306/7038/files/1814813776.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/job_application_form_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/jorutivufoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/54170379437.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/69128113739.pdf
    • https://static.usrfiles.com/ugd/b8c837_af13f12ea6b44629b2916983f8d010b6.pdf
    • https://static.usrfiles.com/ugd/c5d40f_eb88626b1eb64a4c97504681071ca191.pdf
    • https://static.usrfiles.com/ugd/b8c837_96a149e641464d90adf3337cd2ec1329.pdf
    • https://static.usrfiles.com/ugd/902d29_8cafd285bc244da9a4598a31be6f9b32.pdf
    • https://static.usrfiles.com/ugd/36f25b_af0615dcf9ec44aebb09fc69a6da2ebe.pdf
    • https://static.usrfiles.com/ugd/fd3290_1bf4712003fb48539569af31cb6f5eda.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_off000065df.bin
f5903b4cb541fd9e63aa326ce55c43ade90d3adba7fdc30e389c4e3d1e40e5bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 5248 bytes
font_01_sfnt_off000077a3.bin
ba465083cc6f6baf51d90965a25089e3aca835d825b8f50aecf3dbc8f52fa3f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 10280 bytes