Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57467330db21b0f…

MALICIOUS

PDF

41.5 KB Created: 2020-09-08 05:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e9c4eb24b1bc9f96176fcf5d92e6969 SHA-1: af51e223ca61b72893fe010b3b0572b14d7a46ae SHA-256: a57467330db21b0fc0bbcf62b3fbd0e81a36c451dcd8adc0697e5c3b395d8fcc
128 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, specifically pointing to 'https://ttraff.link/wix?keyword=instagram+app+for+android+mobile+free'. This URL is embedded within the document body, alongside numerous other links to shopify.com domains, suggesting a link farm or SEO poisoning tactic. The presence of urgency lures further supports a phishing or scam attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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.
  • 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.link/wix?keyword=instagram+app+for+android+mobile+free
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/chrome_extension_for_android_screen_mirror.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/16695775119.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/68093455770.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/miliseconds_in_a_second.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/sazademofokare.pdf
    • https://static.usrfiles.com/ugd/b8c837_548c94c05dee4178b9bbfeab9398e19c.pdf
    • https://static.usrfiles.com/ugd/bb05c1_0ee12729959d46c699b2f3cbdb8ff243.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/87496109658.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/dekuwu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/54527859003.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_off00006459.bin
91204442061a3ea13e256a92d5ae1cac85d245959a4ab9862482c5a9aba6d9ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 5440 bytes
font_01_sfnt_off000076be.bin
7bfcdc8c07fe5bbf8f304b89c0836c5d5f3b46a144aa8260dcd87e890ea27278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 10152 bytes

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