Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c0f02aa67761c0…

MALICIOUS

PDF

39.0 KB Created: 2020-09-11 12:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 045f844e1e3654658500d654bb1bc3dd SHA-1: 33c86b560e8216d216f05dc68b8b5d46145e45d8 SHA-256: 78c0f02aa67761c0052347c51a976f31b1e07fa9c5030beb3218db66fbec488b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic findings. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly indicate a malicious intent.

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/wb?keyword=manual%20of%20veterinary%20echocardiography.pdf
    • http://files.tesslockhart.com/uploads/1/3/1/6/131608037/fokegipafowa.pdf
    • http://files.domaplasma.com/uploads/1/3/1/1/131164534/gifuwubumip.pdf
    • http://files.kiettaicao.com/uploads/1/3/1/1/131164524/pifitefub.pdf
    • http://sotelid.nikkicshairstudio.com/uploads/1/3/0/7/130739069/jalixagomunejunugob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3969/4741/files/murmur_of_the_heart_full.pdf
    • https://cdn.shopify.com/s/files/1/0437/8204/5858/files/swiggy_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/product_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/muvuvizujiranozilexenowog.pdf
    • https://static.usrfiles.com/ugd/a298ce_90ded67b1ed44c4aa246b4496bf86407.pdf
    • https://static.usrfiles.com/ugd/1acd69_54ee2b22b2e24d119b5487dc2e6d0c46.pdf
    • https://static.usrfiles.com/ugd/c4f63d_394392ec97284772b7ab7244f1a7a873.pdf
    • https://static.usrfiles.com/ugd/353d00_15798decbf2e491ca89a607cace66bfb.pdf
    • https://static.usrfiles.com/ugd/74c34a_38be9bef7ba244a0b0c3a8e2c7b4d382.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/moderibuwotujorigetigiror.pdf
    • https://cdn.shopify.com/s/files/1/0440/3304/8741/files/fixed_left_sidebar_css_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/bradenton_police_department_crash_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8291/files/nusapus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/horizontal_scroll_view_in_xamarin_forms.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_off000059f2.bin
6b40be2a5c57c2768249d2fe56cac3c74d8af3c3465aabd2217839e70fb5cb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 5440 bytes
font_01_sfnt_off00006c92.bin
e7f537687bc803122833c9fce9465b5cb2b3672d24d509f78a47d9d8daee94e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 10332 bytes

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