Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7714076938ec0f8…

MALICIOUS

PDF

58.3 KB Created: 2020-09-19 06:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e843005174bb3f1684fa319550758b SHA-1: 5051d5e8cf8dd47bd55a34835bd529b373ac90d7 SHA-256: d7714076938ec0f8b1a0d1a31e8d27c84f643198554f8e3ccf64dcd6260df36a
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL along with a lure related to 'Star trek fleet command android guide'. This suggests the primary intent is to redirect users to a malicious site, likely for phishing or malware delivery. The ML classifier also 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.me/wix?keyword=star+trek+fleet+command+android+guide
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/affairscloud_current_affairs_weekly_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/tarewunomubepotipivuku.pdf
    • https://cdn.shopify.com/s/files/1/0462/3840/0661/files/midigagoripopurozonaluja.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/constitution_day_worksheets_for_second_grade.pdf
    • https://b447441e-346f-4a65-b80a-4e85c11f3eca.filesusr.com/ugd/e4ee87_67dd8728f0b348888fffedbc08855300.pdf?index=true
    • https://4a4a0713-12c3-40ee-a50e-f9a861cba7fb.filesusr.com/ugd/31bf02_50017deda525476eac7244380b05026c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/shell_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/81758458379.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/pusanarenoxubetij.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/jiradikuwezujitawilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0318/files/gmat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/calendar_october_2019_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/cancioneros_cristianos_para_guitarra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/sozujegabewudif.pdf
    • https://cdn.shopify.com/s/files/1/0438/3437/6352/files/fevuboxivim.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_off0000a810.bin
bb92859bd3f169826700060eef4cbd113317508372244f578b6af4be97d89293		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA810 5328 bytes
font_01_sfnt_off0000ba22.bin
c83d6dd8cc1851198367688f3a5daaead1d3a47e39c91f5e3911738c4267851f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA22 9968 bytes

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