Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cafbad4ee54b62…

MALICIOUS

PDF

40.8 KB Created: 2020-09-03 00:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11da2a29223267c02919c529dc853b4e SHA-1: 0f832439fbcf852d006865c9d3272f1615957288 SHA-256: c3cafbad4ee54b62d46b3e6f9b6d7cb2f5e8338dc7a18ac952b62309fabc8efa
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is an 'editable html calendar template' and includes the malicious URL. The presence of a large number of external PDF links further supports a link-farming or redirection-based 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.me/wix?keyword=editable+html+calendar+template
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/xonuvexokilesonalerokufil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/cbse_net_december_2017_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/63012747358.pdf
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/free_invoice_template_in_html.pdf
    • https://static.usrfiles.com/ugd/eb6612_3f417a3a62424e0ead8ba6f57d2d18ea.pdf
    • https://static.usrfiles.com/ugd/99afdc_92256213be984d3f85f66ffc0c1ede60.pdf
    • https://static.usrfiles.com/ugd/739437_c4ff862bd1374a37a3446b146924188d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7430bd5b64ba4af181249ef819609fc0.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/13196112457.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/mixiweribuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/33780789814.pdf
    • https://cdn.shopify.com/s/files/1/0460/3694/3007/files/angry_birds_star_wars_2_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/88956519708.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_9c353b9a4fd745ccafd94cc8e8644c87.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c3926fca7d74a2a99aa658980a2377a.pdf
    • https://static.usrfiles.com/ugd/b56239_8e1a2279b03f48c0a876d75173b16c4e.pdf
    • https://static.usrfiles.com/ugd/5c139a_7bb180d2716f496884eadfad1fd9239b.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_off000061a3.bin
848854fcc7c3af516d31c62dcc4146fb25460fed0899818f6bcbdb3a373c19e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 5232 bytes
font_01_sfnt_off0000733f.bin
8f7df85c386e073ad33bef9c80efb54731f0b7eecbe681b77a5ebdb514185a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733F 10304 bytes

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