Malicious PDF — malware analysis report

Static analysis result for SHA-256 17515c0637c07f24…

MALICIOUS

PDF

94.1 KB Created: 2020-09-02 07:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e479ce6623254749d72f8e05c38815 SHA-1: e9a3554a9be37aa4ab3d97bba5b971eabb964f25 SHA-256: 17515c0637c07f249ac7e3ead4c76ca4c36be2df6c11e8c6df43def50b1f4a30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 28 external PDF links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Blender 2.8 full version free' and a URL that appears to be a lure for free software. This suggests a phishing or scam attempt to redirect users to malicious content.

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.link/wix?keyword=blender+2.+8+full+version+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/909b15_b922a33335614dc399320b38b899db1f.pdf
    • https://static.usrfiles.com/ugd/cc089a_621cb62dc87647c497a1ed8d211aef67.pdf
    • https://static.usrfiles.com/ugd/b8c837_eccb0b54df924fa4ba0bf46874c9902f.pdf
    • https://static.usrfiles.com/ugd/b0cd75_561104ef3b884c7baaf4146e443a4344.pdf
    • https://static.usrfiles.com/ugd/430cb2_6c2bc044c90c4eae8ea38618d9433eae.pdf
    • https://static.usrfiles.com/ugd/ace02d_142ce402defb4390a06872a078dd4c0e.pdf
    • https://static.usrfiles.com/ugd/5b604d_94384c141dc34d048f8e5d52a9ceb21a.pdf
    • https://static.usrfiles.com/ugd/158fb9_e445ac9ad275417fab71d51c2b5e1cf2.pdf
    • https://static.usrfiles.com/ugd/49488e_7d3ed8d8bd47405397a70fcb4dbdf29d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/11554954582.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/pavojukexivonazoviruvuge.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/le_bilinguisme__madagascar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/xonavosebupodafanubixubo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.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_off00010437.bin
7bf4366641f7621b2705300c53eb4209b8f005836335550d4dd8ed4faf50010c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 13980 bytes
font_01_sfnt_off000131f7.bin
bbc9bf7d9619b68c9694d7493603c680d4f7d73e5657755257913b19abf09fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x131F7 5156 bytes
font_02_sfnt_off000143a5.bin
895ae4a9788276fe2d5d7a514a7039a181d9369010096a60233836771e65a3f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x143A5 11464 bytes