Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f22f0edadcf24c…

MALICIOUS

PDF

44.2 KB Created: 2020-09-02 02:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6592b44b893f52977f31e7b18dc025f5 SHA-1: 171ac7be9d8f645196ce13bbba2fea7d1a37b9cd SHA-256: 62f22f0edadcf24cc7bffc118e37842470bac5f326994ae6715c35f248828590
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One prominent link, 'https://ttraff.link/wix?keyword=vba+vlookup+on+different+sheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure under the guise of providing VBA-related information.

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=vba+vlookup+on+different+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8121/1802/files/bts_asthma_guidelines_2016_quick_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/62877106960.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/waweliv.pdf
    • https://cdn.shopify.com/s/files/1/0436/5765/8521/files/bcd_adder_truth_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/karifewafigikigexut.pdf
    • https://static.usrfiles.com/ugd/b8c837_2162611fe1b243b7a8ade55af71b7961.pdf
    • https://static.usrfiles.com/ugd/61b8bf_ffd8e06205e4465bb4536f0b16c906c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_69474a4c75ad4a7082ffc3506eac9552.pdf
    • https://static.usrfiles.com/ugd/b11f6d_a207640dabce4e8b8c3ae54563c6ff7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ac85aa85a6c4456be04a1ff789b1937.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/72234942156.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/45784208056.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/xipowepaxudoranebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/91807263533.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_off00006d11.bin
b04565c95fb5fea58e14be8d9dd067d54131511f80652e32dfe29dfceb5e32c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D11 5356 bytes
font_01_sfnt_off00007f47.bin
a263f326fa59765e7eeb484116a4b30d23b867f18e7c0a56478ec81f82a40ff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F47 10984 bytes