Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0bc1c28a6ee5ff…

MALICIOUS

PDF

52.0 KB Created: 2020-09-01 14:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e7e325b8df9c6fce147bd383c7d82c3 SHA-1: 7e06d1eecd0b14b502de1b32891dafa2de2f62b0 SHA-256: 0f0bc1c28a6ee5ff4b7a5ae836cd26e20ef947082e9af944ba427c3f41fcceb5
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as a download for 'Clash of Clans'. The primary malicious URL identified is https://ttraff.ru/wix?keyword=clash+of+clans+latest+version, which is flagged as a known malicious redirector. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive traffic to potentially harmful content.

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.ru/wix?keyword=clash+of+clans+latest+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/46400651916.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/organic_chemistry_brown_iverson_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/25862542558.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/babiwepixomogida.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/81603385758.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/8053238973.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/dodojulamamewibego.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/importance_of_ecological_balance.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://static.usrfiles.com/ugd/cc03df_f8d85bdfb58a43d591d26194a50b4fab.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_82ecb997120f49509f03e34d60f905ef.pdf
    • https://static.usrfiles.com/ugd/111c46_3bdc009266a64f6c8424c6968bfacbdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c54bd2ae6154264994c4dc68574f727.pdf
    • https://static.usrfiles.com/ugd/76b6de_775a8fb74df640c68dd0daf168593aa4.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/70605109974.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/models_of_allosterism.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/27827681984.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/facebook_login_help_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5472/files/verakupeko.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007551.bin
bec795099b41ea5ce8e38d0c71d4fb43ee1990571a17437bb54af6df60761133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 4932 bytes
font_01_sfnt_off00008618.bin
07d7a009cbc3ee8f7d59ecd0257829e24eb0079ddb9c2971bdfd299546f1db71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8618 10916 bytes
font_02_sfnt_off0000ab9c.bin
bfa32af85ed9733e9d329932c5444ef017f43cd1cf31216f18da05059aa2c43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9C 16632 bytes

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