Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd880b7c2e06c9e…

MALICIOUS

PDF

54.9 KB Created: 2020-08-29 14:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f924e3eee952337adc87004dc659d0b1 SHA-1: 35375c8675d75492b651107f6a5263fc9807f63d SHA-256: fcd880b7c2e06c9e0a429b536d353096dcd910f0379c401936899ce0914b7916
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and contains multiple links to external PDFs, indicating a potential SEO manipulation or redirection scheme. One of the embedded URLs, https://ttraff.com/wix?keyword=spoken+english+conversation+worksheets, is identified as a known malicious redirector. The document body contains garbled text, but the presence of the URL suggests a lure to external 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/wix?keyword=spoken+english+conversation+worksheets
    • https://static.usrfiles.com/ugd/b8c837_3a4dc7d7c37c42408a98ecda436eeb3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8f0a6fa93dd4babb76a95e8490c82dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcf4b8c98aaa4caeb5af05cb87614eb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d564a4fd134b08b55684e92cca70d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_3efbe504d00347aab7220c1f316c624b.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/86537137286.pdf
    • https://cdn.shopify.com/s/files/1/0429/5232/7324/files/wonders_of_the_modern_world.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/minecraft_egg_wars_servers_ip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/joindre_plusieurs_en_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/zarekesemow.pdf
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/denaselinetutirefifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/novel_habibie_dan_ainun_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/jakoxuretawifeviwow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/63688321590.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/xegaxepevajubus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/basic_life_support_free_download.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/
    • https://static.usrfiles.com/ugd/b8c837_f8f0a6fa93dd4

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f70.bin
0bb052bbe4c9973ef8cccbf3414e600f88b94594a286d70f4fe19328f3540286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 5512 bytes
font_01_sfnt_off0000a240.bin
6eeb34935fd4667470e5f6f721a12be801b6c1b6f929e2c25bdb938e65fc6293		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA240 14052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.