Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bda24cfd3bc1387…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 18:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d40e65eb180db70e1bd4de94d258a8f1 SHA-1: 23237fcae01a6a9147da70f3157ac09acb34e8f6 SHA-256: 3bda24cfd3bc13876851709c7f1075f00ee3ef27ef568393155f2a7488a40344
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell

The PDF contains a malicious redirector link to 'ttraff.com' which is flagged as malicious. It also includes a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The document body, though heavily obfuscated, contains the malicious URL and mentions 'ntpc group d admit card', indicating a lure. The presence of a 'SE_LOLBIN_RUN_COMMAND' heuristic suggests potential execution of commands, and the 'SE_CALLBACK_LURE' heuristic points towards a callback phishing or tech-support scam pretext.

Heuristics 6

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=ntpc+group+d+admit+card
    • http://files.oberonmassage.com/uploads/1/3/0/8/130813841/bijemaz.pdf
    • http://vujona.elitedancechampionship.com/uploads/1/3/0/7/130739206/64a4d1fa8162a3.pdf
    • http://zujaniniv.tayahanson.com/uploads/1/3/0/7/130776791/85d41f553409.pdf
    • http://files.ibewlocal176.org/uploads/1/3/1/3/131379789/jalogagar_duximekux_nimuwobab_kulap.pdf
    • http://sedoxex.elksfairwayfoundation.org/uploads/1/3/1/3/131398125/8157139.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/39978161613.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/uninstall_powershell_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/modoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/asciidoctor_title_page.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/for_loop_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5169/files/hemolytic_uremic_syndrome_pediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/35433329757.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/88542565269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53262414385.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/hindustani_raga_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/multiplication_of_binomials_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/java_update_checker.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/49903263687.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb1.bin
6297b96948d7eb7f0f4a7b275d78016cc82eae801a2f396f4a3eb7338a69e356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 5152 bytes
font_01_sfnt_off00007d16.bin
c286e42f6559c24d9f2577171c75940b640744c47909722957d09582759eb7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D16 1848 bytes
font_02_sfnt_off000085f2.bin
c359079c98b30ea4f2f75a14bdb54b75cee8c009ad5fd6a230a966911d041c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F2 10240 bytes

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