Malicious PDF — malware analysis report

Static analysis result for SHA-256 68367874906956ea…

MALICIOUS

PDF

45.6 KB Created: 2020-09-01 15:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682107e0de45d0248aec82fcb093f20a SHA-1: 65f06b2bc7a66fed36b4d6d190935352a9585432 SHA-256: 68367874906956eaca36df047fbf521b354fa0aad1fdbe8fbdbdd0f0f045d08d
162 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 the URL https://ttraff.me/wix?keyword=email+letter+template+for+business. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which is https://cdn.shopify.com/s/files/1/0432/9802/9733/files/jekapazitiz.pdf. The document body, though heavily obfuscated, contains references to these URLs and suggests a lure related to business letter templates, aligning with a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=email+letter+template+for+business
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/jekapazitiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/dewiralizekajawipefal.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/nuzaxobadebunufa.pdf
    • https://static.usrfiles.com/ugd/b8c837_05e8dd3f692e42dd9d7b98aabf6b5b1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5596610641946cd9eae0a897eeec45e.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/47807846304.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/fokexinuliwutokiru.pdf
    • https://cdn.shopify.com/s/files/1/0440/8472/3864/files/33277444481.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/legally_blonde_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/point_group_of_boat_form_of_cyclohexane.pdf
    • https://static.usrfiles.com/ugd/599f1c_869501fdf8564bb9a252c9c700ad6191.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_ba7ca290e3694fc5a848ac95f1330b8c.pdf
    • https://static.usrfiles.com/ugd/eed56f_944e1606cd2d4c1aab51c23783bef121.pdf
    • https://static.usrfiles.com/ugd/c3f88d_4e27534375734f959d4fdc0ce83418cb.pdf
    • https://static.usrfiles.com/ugd/e4bc37_963da28a912340c1be76e14528d6e0a0.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_off00007495.bin
545d4811c4b4ecfc491628c9d9a290c44706c20c0e78073124b0c1133a2534ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 5144 bytes
font_01_sfnt_off000085f8.bin
92eeed44f112fb77a8f5956f864e897d72e8b40e3fafa47d1917fc945788280c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 10636 bytes

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