Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41c8647bb7c11f2…

MALICIOUS

PDF

37.0 KB Created: 2020-08-11 19:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11713c8c310b2f532651919963077da SHA-1: d8f172ce8b8dbbb39bf32103ccaad4fb7ef0df89 SHA-256: b41c8647bb7c11f2af932340bd0eec30cdeb9d402de8590c6769d490dc6c6737
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.cc' is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious redirector URL and a reference to a PDF file hosted on a Shopify domain. This suggests a coordinated effort to lure users to malicious infrastructure through a link farm, likely for SEO poisoning or to host further 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.cc/pify?keyword=societal+bilingualism+pdf
    • http://files.nruzycki.com/uploads/1/3/2/3/132302963/1056549.pdf
    • http://zosawor.cherokeerosehandcraftedsoaps.com/uploads/1/3/0/7/130776445/9108167.pdf
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.pdf
    • http://files.karinamontieldesign.com/uploads/1/3/2/7/132741176/3473040.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/xotitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/bakery_products_science_and_technology_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/96876385405.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/74278129990.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/the_value_proposition_canvas_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/gozukarexafiwemovuvefeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/13388630921.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/37909162713.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/95098114360.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5622/files/87475985543.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/36315694498.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/driver_booster_6._2_key.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_off00004da6.bin
dcfd952b359008b915c5aa6b4cbb48f2bb139b9c68ca41ae21ed1e188e037243
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA6 5624 bytes
font_01_sfnt_off000060a4.bin
8d75aceb88952119ed5a4881a0eeefe5157f6430ad5db1c971f1a8b6c35f0d31
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 11992 bytes