Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa46e841a77f2a9…

MALICIOUS

PDF

38.8 KB Created: 2020-09-06 14:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73ccc943c22f3bd08327104da0a27a18 SHA-1: 590864471fbf51fb584ee42fdb6b4a4a627cc82d SHA-256: eaa46e841a77f2a9080ab929782ccc5ce68199d8dac0e5247503fee7b742c4a0
120 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, which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded links. The primary malicious URL identified is https://ttraff.link/wix?keyword=data+analysis+for+beginners+pdf, which is presented as a lure for "data analysis for beginners pdf". The document body is heavily obfuscated but contains the malicious URL and several benign-looking Shopify URLs, likely intended to add legitimacy.

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=data+analysis+for+beginners+pdf
    • https://cdn.shopify.com/s/files/1/0438/3680/1181/files/52495364961.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/82829391416.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/analog-_to-_digital_conversion_pelgrom.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/free_home_inventory_list_template.pdf
    • https://cdn.shopify.com/s/files/1/0454/6658/3206/files/sejega.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/data_structures_and_algorithms_in_java_6th_edition_goodrich.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/dungeon_master_s_handbook_5e_free.pdf
    • https://static.usrfiles.com/ugd/1df9ea_bcd21200ed9d49fdb562dfb1f012de51.pdf
    • https://static.usrfiles.com/ugd/ea78e0_1412ce1f23dd46ddaaaad95f62ccf63a.pdf
    • https://static.usrfiles.com/ugd/1decf9_9cfb3eeeff174560acfd4b47b1a7365d.pdf
    • https://static.usrfiles.com/ugd/0789d5_7109b8d328ba4c8d9aa8ca1db90e3af4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dac.bin
e4083e975ca2e03ff14f70d0fec448ea5821755a16ccbbedce3637032d038e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAC 5240 bytes
font_01_sfnt_off00005f90.bin
5369f5e6e5ca869eb2e0d63a4d2cc5cc39f20005155ebcf6e35e4b7bba3c0827		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 9576 bytes
font_02_sfnt_off00008040.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8040 4324 bytes

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