Malicious PDF — malware analysis report

Static analysis result for SHA-256 447673bd3368cdd9…

MALICIOUS

PDF

57.8 KB Created: 2020-08-20 14:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90723ec6b015c13c6b724ae7154ae108 SHA-1: 76c5d96227f1d7492af23aa286a9a840722c9624 SHA-256: 447673bd3368cdd93809b213e7efc631aacb299830daba672d2bf798db9e53e1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=free+offline+dictionary++for+android+mobile`. This URL is used in a link farm designed to manipulate search engine results, ultimately leading to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'free offline dictionary for android mobile', suggesting a lure to entice users to click the malicious link.

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.cc/pify?keyword=free+offline+dictionary++for+android+mobile
    • http://files.aaadentalbahamas.com/uploads/1/3/0/7/130775762/tunukev_fevezovugubab.pdf
    • http://files.caavd.ca/uploads/1/3/0/8/130813378/c3ef153c8032a.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/fawudewufafifirep.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/xamarin_android_default_background_color.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/tupasoteluxenapewevemidiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/algorithm_examples_in_programming.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/37186438907.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9782/files/public_finance_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/the_fbi_uniform_crime_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/zewoxuvufogot.pdf
    • https://cdn.shopify.com/s/files/1/0460/5988/0603/files/chamma_chamma_new_song_dj_king.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/moment_of_inertia_of_a_cube.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/fepewibe.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_off0000a4f3.bin
4326f097a1be7943dea18392fb4b102a61dc584224e7522a8a708f0bd68c60ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F3 5184 bytes
font_01_sfnt_off0000b689.bin
b3a0120b26652489a3d9a102aadb705e20412d3cc9c94c7bacdf81087d8d123f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB689 10580 bytes

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