Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d177caa7453955b…

MALICIOUS

PDF

82.3 KB Created: 2020-09-01 12:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1268f65453dfc8a0e091d01166050cdb SHA-1: 40660eeca22ac68c6e3973e447b3d5594b945c1d SHA-256: 2d177caa7453955ba0bc30785074245e61e96c0ebf234db25cde718d3f179fb6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. The PDF also contains a mass external link farm, with many links pointing to Shopify domains, suggesting an attempt to blend in or leverage legitimate platforms for distribution.

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.club/wix?keyword=pronoun+antecedent+worksheet+with+answers
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/xelizokuwenirok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/faxijafijarutekilir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/roxuvat.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/majolip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/90696669780.pdf
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/98260394766.pdf
    • https://cdn.shopify.com/s/files/1/0450/3601/1678/files/amanush_2010_bengali_movie_720p.pdf
    • https://static.usrfiles.com/ugd/71fd01_ec4fceec3a25462088209aa6cef6d884.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b899ab10df643aa8f2c7ed99b910432.pdf
    • https://static.usrfiles.com/ugd/7d21c0_d5f1878e0ada4e06a2d857f1794e6602.pdf
    • https://static.usrfiles.com/ugd/217d68_ea3b2e6d009040129b45278ded613ef1.pdf
    • https://static.usrfiles.com/ugd/d17951_b8bd6d008c44485483d348f59f1f62e5.pdf
    • https://static.usrfiles.com/ugd/45e30f_dd19631723234e2899cc52c4e652afb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4391f989f0747ad83aa98cfd1849e2a.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/71fd01_e

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d9.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 2828 bytes
font_01_sfnt_off0000fed3.bin
d0744953987cd52b6085700796ab5c7c02872628bc8c40fb13df5424a006c342		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 5152 bytes
font_02_sfnt_off00011066.bin
c66d78717118a787708aed5a556eafb0eb4ae582938022a8e8a5aa23bc0b94be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 13652 bytes

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