Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcc84dcd4acba3c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-31 03:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f714e0025301a3fbcf05e3c8bb841f SHA-1: 7e393e50c9df343d015f66b0201bc93b96c71336 SHA-256: 4dcc84dcd4acba3ce152940288d258cff008dce92656e2bd3f0c390281208389
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though partially corrupted, contains text related to a download, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

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.ru/wix?keyword=yfn+lucci+long+live+nut+download
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/new_years_eve_houston_2016.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6971/files/arabic_numbers_1_1000_in_words.pdf
    • https://cdn.shopify.com/s/files/1/0432/3183/8368/files/60341512547.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/bully_rockstar_pc_game_free.pdf
    • https://static.usrfiles.com/ugd/760101_ac201f0f5fb54dffa7ffe6e53a9bbabc.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_d45f3a33206042b3b1a69b95166de731.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83cb3f7aa5748c1ab91b8ec145a8655.pdf
    • https://static.usrfiles.com/ugd/d01287_189e76eac2924eb683eaac61e12f1b32.pdf
    • https://static.usrfiles.com/ugd/451a43_352ec3da6fab4b6c9e250b2528ae1ce5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecca063486524e0cb3f99abcde058261.pdf
    • https://static.usrfiles.com/ugd/9e41f0_87aaf0ba150e45ddbe0364ed84788f09.pdf
    • https://static.usrfiles.com/ugd/1a89c8_f2146ba184bc45f1a9e2f81991bbe1ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_efc3a2a58ac94b36bb8b3bdd4e5be681.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_off00004be9.bin
ec140856788673063932b9940caf19b96b0424b9255d68323cdf5a81fa507701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE9 5028 bytes
font_01_sfnt_off00005d2d.bin
74005400c887fe02dffbe5fc5d91d143527f8657fd210081caf58d853126e707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2D 15368 bytes

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