Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c04e28c83647a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 13:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e8dddce44033fdd66ae8286f25353ff SHA-1: 4dc557a0c230b0d55e8acec5b01684115f2e8074 SHA-256: 693c04e28c83647a42fc492e843501d068d67e3bcfa89ab7479360442f214144
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body also contains this URL, suggesting an attempt to trick users into clicking it under the guise of accessing a 'Berlitz essential spanish pdf'. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the malicious URL is the primary indicator of compromise.

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.club/wix?keyword=berlitz+essential+spanish+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/4189/7113/files/51279232161.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/jiponixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/pugokovopewamegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/formulierung_absage_bewerbung_arbeitnehmer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/zivaxebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/45231073252.pdf
    • https://cdn.shopify.com/s/files/1/0438/1691/1010/files/vsco_application_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/xevogasara.pdf
    • https://static.usrfiles.com/ugd/2e16aa_32114484c9b646379c6d666dc690d91e.pdf
    • https://static.usrfiles.com/ugd/b8c837_aac472d0d2e94c5cb07ef860891dd7ab.pdf
    • https://static.usrfiles.com/ugd/9c43ec_d7e97d4b507c41b390c02fa696889d78.pdf
    • https://static.usrfiles.com/ugd/314c35_fd94c740a85c47809ca68c57dc1723a2.pdf
    • https://static.usrfiles.com/ugd/3fc21f_98ca96ae622246d89fd5655bdb867de4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8afbc1d284604938b04773cf9b93acff.pdf
    • https://static.usrfiles.com/ugd/7c30af_555b5addbf16430bb1f919a67216c29a.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_ac507bee5e81454aae72f5ed81b2ec30.pdf
    • https://static.usrfiles.com/ugd/6f9b04_7d0e48608a8d41edb5c9e57155c507bb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005997.bin
136ee0746d7b81493d3cf5a6c5f7a4cf37bd009582d3785e77c2a74f987d065b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5997 4908 bytes
font_01_sfnt_off00006a3c.bin
902126b76c6b19a716ab1cae8330db189a578ea7175e4f76b8f67507f74d3601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 10752 bytes
font_02_sfnt_off00008ec6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC6 4324 bytes

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