Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c04435cd580cdd3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 03:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3c451f7c6ca4035cb2db983fe8167cb SHA-1: 0e66e9a3a47e558d945f4d15c795b21a544b74bd SHA-256: 7c04435cd580cdd3a99efd3fe149ef01d2be3a0732ef4dea1531be3fd036bf58
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'English four lines sheet' and the malicious URL, suggesting a lure for users interested in language learning. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the intent to redirect users to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=english+four+lines+sheet
    • http://zadelux.pinelevelmbc.org/uploads/1/3/0/7/130740522/guzafogudon-xozifukededof-tawefor-datosufizivusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/wavapebexix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/91897772342.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/zelizewimekosit.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/58270990390.pdf
    • https://cdn.shopify.com/s/files/1/0432/5002/4603/files/capellania_hospitalaria.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/arduino_course.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/oci_application_form_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/mozemowodipazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9445/files/samonavefavisefukim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6781/files/18098028764.pdf
    • https://cdn.shopify.com/s/files/1/0440/0827/6126/files/pawedofemokexav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/40544538936.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_off00005ae6.bin
44234a4953b9a8856c933cbb4ce0b11c1d5cb96eef38b6ec3f6f85712f82bef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 4776 bytes
font_01_sfnt_off00006b27.bin
331c0f14352308e18d2c8228046a39806693da94a5799206585264b03323e256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 13852 bytes

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