Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff175c7916cd7d64…

MALICIOUS

PDF

46.1 KB Created: 2020-08-29 02:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34084cfeb45a4f212cb732fd8e00ddf0 SHA-1: f2ce28004f9e5b1289bfc573d7218285dc2e5213 SHA-256: ff175c7916cd7d6493856ea8c6f01fd8d909d2b7ba0b6bf54a863bcfe9473881
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or link farms. One of these links, https://ttraff.com/wix?keyword=macbeth+act+2+scene+3+translation, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient to classify this as a malicious document.

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.com/wix?keyword=macbeth+act+2+scene+3+translation
    • https://cdn.shopify.com/s/files/1/0459/9460/6751/files/55061453336.pdf
    • https://cdn.shopify.com/s/files/1/0437/8643/6759/files/tegiperuvejexotenimeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/soul_eater_blair_cat_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fdf14fbccdf47169eb3b1d1f1c95a63.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a2b4f95692f4b54b6e802b59bb32fc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9ae686848544d579930338734846f5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9df525fec94099a8c97dcaba23c6f5.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/31591968761.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/16651564977.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/wexiwujal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/socomec_atys_c30_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8884/6753/files/84536879521.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aad1a7d4d234b7d821a4e902bbc6bbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dd1668e45fa4e5baa66a259ade62de2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b67e69f875a5445e8638a58bcf8d738a.pdf
    • https://static.usrfiles.com/ugd/b8c837_184b8fb892aa49e5bf07b8003eeaf816.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6d61d92a1c948e5b88b6573c3cee4dc.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_off000076d5.bin
1cc0add7d1717c1113a43e0afca0a674c655d92a70e8abb16388a0a219fd3a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D5 5328 bytes
font_01_sfnt_off000088e4.bin
836a4ad70a6136e283ca6fb2ebc99c2a79fcfdab4b041231eff9b8f5b4ff1192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E4 10156 bytes

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