Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9270cee87647b8…

MALICIOUS

PDF

58.5 KB Created: 2020-09-01 19:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb5dc8a52e40529a95e3aa43eaf4c28 SHA-1: ff154db35d49049c432da4300355ccc41af38b60 SHA-256: 7d9270cee87647b82980a7530fb7c79bd60a836232faede814c7e2782101eac9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to obscure the malicious link.

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.link/wix?keyword=sample+kick+off+meeting+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2f07a1_c0b0114860a5443b91ca8fba240c7e26.pdf
    • https://static.usrfiles.com/ugd/cec570_5d7a68f9bd9e40878ff5d1942de6336d.pdf
    • https://static.usrfiles.com/ugd/4b874d_64e3ba9237fe4f5485fa18ea2bd8f48c.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/azure_sql_server_vm_performance.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/carrier_wireless_remote_control_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/exercices_etre_et_avoir_au_prsent_ce1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/fetobovel.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/kitab_barencong.pdf
    • https://cdn.shopify.com/s/files/1/0464/6056/7704/files/important_unix_commands_used_in_informatica.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/dailyfinance_my_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/14046343436.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/puzuxinujoru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/mipekukoxanekerudomiloduw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/universal_themes_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/attestation_de_salaire_declares_cnss.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/wumolafenozup.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_off00009e32.bin
862416ca9604c201fa15f0bd28672fd9102b34bf8ffc22bb10c5a53ced252286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E32 5228 bytes
font_01_sfnt_off0000aff3.bin
1f756b46481ac718095810e133e155ec1caf818687d25c20e8b002f727d713c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF3 2116 bytes
font_02_sfnt_off0000b99f.bin
fde0d573e5b6049a6552863475acdfecfef0b4a38cc950da0ae16c759d6a0517		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB99F 10264 bytes

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