Malicious PDF — malware analysis report

Static analysis result for SHA-256 966d295da6f2c2c5…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 13:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37126f8bb383a9769d0b03bffd7d0d5a SHA-1: f090e8711736248bcc1dd9c10b39725f080282d7 SHA-256: 966d295da6f2c2c5be553b79fce8eb0f740b63880dd26e2237f7a9666bcb74f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a microphone issue and the malicious URL, suggesting a lure to a scam or phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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/wix?keyword=arctis+3+microphone+not+working
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/1490936185.pdf
    • https://cdn.shopify.com/s/files/1/0455/5584/3237/files/abelardo_castillo_libros.pdf
    • https://cdn.shopify.com/s/files/1/0461/6473/8200/files/bogaperogivulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/55966209082.pdf
    • https://static.usrfiles.com/ugd/ea2f88_dba0bb4ab61e4b6f98ecb8c8899d9ad2.pdf
    • https://static.usrfiles.com/ugd/b8c837_afd93b34cf5044dc8fdf7ef74441fcd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3280a7840346168bfa1539943b65ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_d82adfd76b7f42a78f74ed560df4652e.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/73367470257.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/wajijib.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/diseases_of_circulatory_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/17539254594.pdf
    • https://cdn.shopify.com/s/files/1/0438/8130/0123/files/anastasia_animated_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/barricades_safety_management.pdf
    • https://cdn.shopify.com/s/files/1/0462/2083/7018/files/corel_draw_x5_full_crack_portable.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/endocrine_glands_labeling_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/mathematical_logic_a_course_with_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc0.bin
684f33a17eaa4d1aae037abb039a0b65a3d83751ee4eb9d7ed5f98f821cc5c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 5416 bytes
font_01_sfnt_off00007e1c.bin
06eaf791d39199465da9c16f6dcc727ff018f4ba2592ff3d14a397676d0aefbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1C 10360 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.