Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf5c9cfe5f368b8…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 07:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34c2d025a3c29a94932de914443f562 SHA-1: 28ebca1a02d655963a9443c6bd7417bcbb37aa1b SHA-256: edf5c9cfe5f368b8232a77224fdb9522a1a9f59226783623ed306032222b2ae7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links to external PDFs, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'prison break season 3 free download', indicating a lure for pirated content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=prison+break+season+3+free+download
    • https://static.usrfiles.com/ugd/b8c837_2022674e470743d2b4a94ddb18289e38.pdf
    • https://static.usrfiles.com/ugd/ce77c6_da76a294f10e4e1b8d0eda75e2896789.pdf
    • https://static.usrfiles.com/ugd/23b571_334d201d72ae4dcd916ab2e080eb61a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_720f27dbbeea4f4584d63ef9ccc4cf04.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e3d2afce0414796b97d8b1b9369c023.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/kovefiloxinoranuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/vakime.pdf
    • https://cdn.shopify.com/s/files/1/0462/5347/3941/files/start_again_song_one_republic.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jiwisixagubokolezadafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/35038690134.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/41014328295.pdf
    • https://cdn.shopify.com/s/files/1/0436/1050/5373/files/sound_driver_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/carillion_kpmg_report.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_off0000620f.bin
b935933e302d428d76de6799f7e04b26e28c1741122c6eb380afed0046953151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 5364 bytes
font_01_sfnt_off00007465.bin
065ac9944c722e4b45b01148c0efccd05a95b41dc51bfcb4b69059c34a652fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7465 10872 bytes

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