Malicious PDF — malware analysis report

Static analysis result for SHA-256 1789cf59d71efcb3…

MALICIOUS

PDF

47.2 KB Created: 2020-09-11 20:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6a8dc46f6d5ca53cff89557c92c31b6 SHA-1: c05b79f9733441aaa4df26bb2364941396cc91e9 SHA-256: 1789cf59d71efcb38048c6e11773943cba998164238b0a0300c7487ff1f4792d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=jungle+tier+list+proguides' which is likely intended to trick the user into clicking it. The PDF also contains a large number of external links, flagged by PDF_SEO_LINK_FARM, suggesting a link farm or spamming operation.

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=jungle+tier+list+proguides
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/90d19e_d9363b4d44134523a2e938484c1a3340.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ebabf572332487ba4a4f7712ca3cfcc.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_0dc6e55ed8a947749756e4e14150638a.pdf
    • https://static.usrfiles.com/ugd/b13fd1_fc91a4e5a7b2499490470113ded2a392.pdf
    • https://cdn.shopify.com/s/files/1/0465/0965/4174/files/lsat_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/41492637120.pdf
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/tifosinubiberonibedili.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/perelenunewapufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/cyanocobalamin_vitamin_b12_davis.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c5064a05d2f46b4ac596c50e7c9ba93.pdf
    • https://static.usrfiles.com/ugd/479fa9_ed433daf59f94928b98bb185da703d7f.pdf
    • https://static.usrfiles.com/ugd/828753_53782804cbbe46878d57b22f166d28a0.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_9c10ea2acbe84ea8bfef1b6ee176ad15.pdf
    • https://static.usrfiles.com/ugd/5bf82b_bedcce3c5004416c8e8299efb898e159.pdf
    • https://static.usrfiles.com/ugd/8da65f_fa7551eb13f84fbe8929f5017f117e41.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006454.bin
9775ea1988fd93615ab56b6a28e8d385888e76cd964ac134f57385e4ff8f073d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6454 4788 bytes
font_01_sfnt_off000074a2.bin
5070a67ac5bf49db9dd0c40163db6755dde4b80c04cf7b9b2556880bb04345be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 14540 bytes
font_02_sfnt_off0000a16b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA16B 4324 bytes

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