Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e11e285ccb9a429…

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 01:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3238c38190d0205aff31140735466296 SHA-1: 73594e1022ac510e1cafe1e9deff11b083bb8e52 SHA-256: 3e11e285ccb9a4299d7ccd0b5b5c5fb2cc2d08beb165b607ac3987af8ec8bb2d
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wix?keyword=philosophy+and+opinions+of+marcus+garvey+pdf', is flagged as a malicious redirector. The document body, though heavily garbled, appears to be a lure related to 'philosophy and opinions of marcus garvey pdf'. The presence of numerous other links to 'static.usrfiles.com' suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=philosophy+and+opinions+of+marcus+garvey+pdf
    • https://static.usrfiles.com/ugd/1813b3_537ce47cc28a4db2ae0e8cdf0fef9cf5.pdf
    • https://static.usrfiles.com/ugd/d5415a_c8a7eb9ef55b48a592646a309b53875b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dfe3cd130d2468e9d7e37d35cffdaf3.pdf
    • https://static.usrfiles.com/ugd/ab922d_5fc92992346e45b3aae2402a5582bbcb.pdf
    • https://static.usrfiles.com/ugd/6df952_04baef14ec794cd18150746ce68bee42.pdf
    • https://static.usrfiles.com/ugd/8de238_107d51cf615445c582c874e59f69af4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f629cc0bc584e1088d5d1d04d2847f5.pdf
    • https://static.usrfiles.com/ugd/45fd81_610399383c18404aaa3fe46992b89726.pdf
    • https://static.usrfiles.com/ugd/8ba634_bef3abac1c0e4981997b6a16a1cf5086.pdf
    • https://cdn.shopify.com/s/files/1/0440/8649/3349/files/82677770776.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/50917467061.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/20258221868.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/81071990808.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/sutibabuzinib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/malogudenagadadi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dee.bin
f208e248b153e6cf1fc83c15bfb9c7d9bb0a987de51cdb7e39f51898b0ae941f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEE 5732 bytes
font_01_sfnt_off00007138.bin
fb04a38102e4e279bc1ce12333638b5ad348e31ebee40159b32a80c15aad823a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 1984 bytes
font_02_sfnt_off00007a61.bin
bf2d9b53f5dd0aefa7ffc498604baf67478d66a7364876810da6f00aee0570f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 10312 bytes
font_03_sfnt_off00009de6.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE6 16164 bytes

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