Malicious PDF — malware analysis report

Static analysis result for SHA-256 8999024095d996d4…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 07:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b8cdbd45c8c38a6e5dff82a1e8dbef SHA-1: b9ab0e08924706df42b2ae720e5f83d32ae0fa37 SHA-256: 8999024095d996d48f73b681739e196ec4f781d8e4125dd55537676ac6f646e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO poisoning attempt. One of the primary links, https://ttraff.com/wix?keyword=bravetti+platinum+pro+convection+oven, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting the intent is to drive traffic to malicious infrastructure.

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.com/wix?keyword=bravetti+platinum+pro+convection+oven
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_01fac31c07364ba190484afae6da9376.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea5c6f37434c4358935f830292bf100c.pdf
    • https://static.usrfiles.com/ugd/dd4472_ca7864767f404ed98aa5278a9d1ed977.pdf
    • https://static.usrfiles.com/ugd/c3f88d_17c3b7499b2d4046a5823a80a1f2c054.pdf
    • https://static.usrfiles.com/ugd/b8c837_d850670ac11a4000abbfad43d7352e1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ef973fbd9a54f15b7e955485d6bae70.pdf
    • https://static.usrfiles.com/ugd/ae15ca_dde6d26e1a9d40128b81787e9db044ff.pdf
    • https://static.usrfiles.com/ugd/353d00_a5776e6026244e86b9992523b17f952a.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/muguxipewumunobug.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/gimakuzokesox.pdf
    • https://cdn.shopify.com/s/files/1/0448/1286/1600/files/gojipasofanome.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/8838954377.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/49866709229.pdf
    • https://static.usrfiles.com/ugd/bae363_e6ad1948d88447578eea31d6949b30f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3654629aa2064e9a974cda5dc80845c2.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_off000065e8.bin
1170fbe21d6e29019b2754676ca2f478190111fed17ef107d4674b02fc731438
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 5008 bytes
font_01_sfnt_off000076de.bin
cf3d1af1bd2d6a7b6437457430826e570da4e075cb0df69e7745a4b26e9d1423
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DE 10472 bytes