Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c4744f589d893a…

MALICIOUS

PDF

47.2 KB Created: 2020-09-08 13:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ea0d711bb61fb65d74d19511cffec3 SHA-1: 2ee579ad4dc0447725e4df110a9926acd482f72e SHA-256: 18c4744f589d893af389baa4e5001f2109704a25b5dd7ac19ee572be44ccbd58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=cycling+training+program+pdf'. This link is presented within the document body, suggesting a phishing or scam attempt to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting a malicious intent.

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=cycling+training+program+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5119/6314/files/3299520104.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/vsphere_6._5_u3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/70598684309.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7713/files/21881479000.pdf
    • https://static.usrfiles.com/ugd/f4de5e_6a545f33679047e1bb611674b224ad6c.pdf
    • https://static.usrfiles.com/ugd/8acad3_4d46b9f4c4dd44e7abcda2e46ea00e7a.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/journal_article_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/79844537089.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/audio_cutter_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/37906055301.pdf
    • https://static.usrfiles.com/ugd/77d535_f55ed27090fd4ab2953619a73fd60ca8.pdf
    • https://static.usrfiles.com/ugd/67e251_34cedc72fc4443f281bac588261bdc97.pdf
    • https://static.usrfiles.com/ugd/9a242c_266db9c5208d466692ca69357840234d.pdf
    • https://static.usrfiles.com/ugd/74c34a_a24e48d104f6465390873bd3a7ccf672.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fff9f9f92fe470e8787a2c9e5916a9e.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_off00007a29.bin
99f8ac06ce91a3893e17d06c1a41dd3d57e64c0b00fb8fe5c2015a7cde6ad507
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 5304 bytes
font_01_sfnt_off00008c28.bin
2edc142ee55ed77544bffe535ce59378ae9678dd75c690fd937ae497c4d1d368
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C28 10416 bytes