Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c6f50eb314d10b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 20:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ca80f3e2a24c3dc2a92c1cdd44105f SHA-1: a170d145e4f8ed51376ea16c072cce125897e454 SHA-256: 28c6f50eb314d10bcec35116467f22aa5e9bd09d6268d4b8e24b8678d8c6902c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.link/wix?keyword=zona+modificada+ahora+pastizal. The document body contains garbled text and embedded URLs, reinforcing the finding of a link farm designed to redirect users to potentially harmful content.

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.link/wix?keyword=zona+modificada+ahora+pastizal
    • https://static.usrfiles.com/ugd/b8c837_f7e58743c2014c5bae040b09d7186fc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2863a4281c654086a1442c871ca674b3.pdf
    • https://static.usrfiles.com/ugd/269bb8_31cf696d415c41bca84ef645748da5d4.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/nipple_blades_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4001/files/soregital.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/tuluputoregekunesiwidaru.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/makesavi.pdf
    • https://static.usrfiles.com/ugd/b8c837_980e1393dd6346279d5be4732cd1654f.pdf
    • https://static.usrfiles.com/ugd/90423f_81dd4ec6ef824f0c9b1d06df22e0ff7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_dff7c2f01dfb49fc867614780af3b1a9.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/christine_hine_virtual_ethnography.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/learn_excel_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0452/2590/2240/files/baseball_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/memasewejivuruv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/cells_and_their_organelles.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_off00006407.bin
7558fdf0f6f7cbb7eee758e7562f327d768bee93b2c025e59f29e6844cbe4ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5400 bytes
font_01_sfnt_off0000763c.bin
e4efa653a10935804a7c8097d17dc5de2541db71ad94f79e0fcb2879dba85a44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763C 10492 bytes

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