Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed76d4b31a69d600…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 15:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42baafec04e0166f6a7b1e765ef56ec SHA-1: 4f489586faf743857b2e6082d70306f41f5bafbf SHA-256: ed76d4b31a69d6009cbc2903f80d20860c94c103b33c6c6938b36c319a784d36
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, many pointing to external PDF files hosted on static.usrfiles.com and cdn.shopify.com. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=priston+tale+archer+guide'. This suggests the document is part of a link farm or SEO poisoning campaign, likely designed to drive traffic to malicious sites or distribute further malware. No scripts were extracted from this sample.

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/wix?keyword=priston+tale+archer+guide
    • https://static.usrfiles.com/ugd/b8c837_00599d8ac6fc4720becba405955ae7e7.pdf
    • https://static.usrfiles.com/ugd/b58d21_64295593c4c3434280606de6597bda89.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a43bf9a8aae42f4a207955909f500d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc34efc87aa42328f72b61516303866.pdf
    • https://static.usrfiles.com/ugd/b8c837_74f958602e7b405f9f6699054cc60f52.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/66901462898.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7463/files/buy_android_box_ireland.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/up_board_maths_book_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/ergonomic_design.pdf
    • https://cdn.shopify.com/s/files/1/0464/6843/2040/files/ralawomepujofunopa.pdf
    • https://static.usrfiles.com/ugd/b8c837_656e513a77274f1c97b5d609382164e4.pdf
    • https://static.usrfiles.com/ugd/ba3095_a10351414c6749e99533e4a6ee4c26c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee56a1f1e6994cc096b493eadf3f2424.pdf
    • https://static.usrfiles.com/ugd/b8c837_60a768afe3bb40668840153a44651bf2.pdf
    • https://static.usrfiles.com/ugd/60933b_2e30d4f3f4e24db8afb40041a64234f2.pdf
    • https://static.usrfiles.com/ugd/576447_125ccf5d6dc04cb0ba5aff6cfe268714.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_off00006407.bin
29df45c19de3f47c1b2a743d5ded6ac4c9ab32258cd182eb09283f9487550fba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5204 bytes
font_01_sfnt_off0000759d.bin
11717a3289b9b0220372a7837f95788c3a03229e966edc522b8395e664c5a969
pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 10096 bytes