Malicious PDF — malware analysis report

Static analysis result for SHA-256 461e3ddc00a7486b…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 04:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4e493275333f86ca257762ebc30ffc1 SHA-1: 571b5e3dcff619ce9446f203c76e92cce59865a8 SHA-256: 461e3ddc00a7486bb56fec4ddde703b98cf8d1fe329835225dc76bb541e6eed0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=christmas+songs+free++mp4', is designed to redirect users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely for SEO manipulation to increase visibility of malicious content. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=christmas+songs+free++mp4
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/carry_on_maratha_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/70346259290.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/nugexipujodifema.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/introduction_to_statistical_machine_learning_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0382/9657/files/below_zero_map.pdf
    • https://static.usrfiles.com/ugd/b8c837_423207164244401794b466760c6e51b7.pdf
    • https://static.usrfiles.com/ugd/3f80ec_69355399b19246ec9b3bbc85bcb8ff00.pdf
    • https://static.usrfiles.com/ugd/590778_4a1d2ac65c1240dc8438b37b0fdefc90.pdf
    • https://static.usrfiles.com/ugd/739437_433ccbd0117a4fe5bf7b96b41a929bef.pdf
    • https://static.usrfiles.com/ugd/a48928_5d201de348144abb9c352743078cdf82.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6372/files/fundamentos_de_marketing_philip_kotler_6_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/jogolunenolinexoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/turbina_savonius.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_off00005fa6.bin
fabebffbbf649b704900c1fb3459eb3e6aa245c311b93f4d7b84c97713ae50ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5276 bytes
font_01_sfnt_off0000716e.bin
52e4245d93f35176352723834e762860450a39c4b5fd3674b7b7880a793c1f22
pdf-font-stream PDF embedded font (sfnt) at offset 0x716E 10420 bytes