Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ffb07e638aba6c…

MALICIOUS

PDF

48.4 KB Created: 2020-08-24 00:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db873dd9dd520ca2ae5a23c427f9b36f SHA-1: 27fdc524b960623e32e85d75beea0cc0404afeca SHA-256: e0ffb07e638aba6cf2cde371ba2f80ae0121fc154b9bab6f2f4799fedc5a7375
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com, with a query parameter suggesting an Excel macro lure. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text fragments related to Excel and the malicious URL, reinforcing the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing 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.com/pify?keyword=excel+macro+sheet+name+reference
    • http://files.shorelinepta.org/uploads/1/3/2/6/132681931/6166336.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2593/files/babuzipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4932/8533/files/radetiniwos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/wild_surge_table.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/raxibami.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/38490101006.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2161/files/asurion_affidavit_form_att.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/funinininipilonejurosame.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/bilabex.pdf
    • https://cdn.shopify.com/s/files/1/0434/7143/7984/files/fibaxamanebuxudeju.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_off00008151.bin
c561eb8b1f7e837181eca6d9faa2b9cdfb145e6c4bbf633245b8d4b41c3a43f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8151 5144 bytes
font_01_sfnt_off000092a9.bin
711fe2e2d28028d04ee0ec724e2bbfb85360c6ab4fa5038cdc0797c9df753b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x92A9 10060 bytes