Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eccec6fc3fd1102…

MALICIOUS

PDF

52.5 KB Created: 2020-07-24 16:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b0f4e972fa61fc99267ad06cadd78d SHA-1: d8d774ae3c47f4656b70cc2034ce4bb8c033e75b SHA-256: 7eccec6fc3fd110244afb5346190fa0267a9e6a286db07141d3fb834a38de186
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, appears to be related to 'analise swot pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness.

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/pify?keyword=o+que+%25C3%25A9+analise+swot+pdf
    • http://files.vacavillelimousines.com/uploads/1/3/0/8/130814283/524266.pdf
    • http://files.sharonrichardson.net/uploads/1/3/0/7/130776607/teseke_fibasuxafadese_bajidojorodak_vixobar.pdf
    • http://files.emrglab.org/uploads/1/3/0/7/130739170/8037301.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/68810572539.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/60945996475.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/woxig.pdf
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/15755423935.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/75223687401.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/73372842874.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/11236313132.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/joxoxolazuzarija.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/32146766955.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/kumopobegitaxena.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/wefakalexume.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4393/files/27536208931.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/rosaxosubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/lutuxunuzulevuzed.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_off00008c8d.bin
15a6ded4ec395f99ce9511c3c2af24dd3d2148919d2a0b3486bfe628df71a707
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 5208 bytes
font_01_sfnt_off00009e26.bin
60fe6786217781e866531bdfd68913a75552aab3e65a7f90acc3c9f82a7684c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E26 12032 bytes