Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1774b9f0ed07587…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 11:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b3d85da2b3d0f595df88e9e23936c6 SHA-1: d984afc258a61443575e13e4e8209ffd18a3f263 SHA-256: f1774b9f0ed07587828f1df522fbbd30afc4d6a6b1e1c298d7dcff3bc0a4d6c0
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a redirector link to a known malicious domain. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The primary malicious IOC is the redirector URL.

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/wix?keyword=19+dias+500+noches+edicion+especial
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/smartermail_oxford_networks.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/tufozafokoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/miwutozikuzezomix.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/wederumejum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/bijenawotasapexozigun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2531/files/3161840188.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/91075884030.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/62673656383.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/mibemufomutepivifevam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/33184340540.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/eng_vs_nz_3rd_t20_pitch_report.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8567/files/drug_induced_immune_hemolytic_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/41377068965.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/
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c0.bin
843df5e63029558bd714b3473c4aee478f5b967ead98ec1d1faf2ba7dd36bb56
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5444 bytes
font_01_sfnt_off0000753b.bin
92dc6903473cb49b3e1457af1fe02122dbc2abeecaa1e9a6a8f10216d721bb22
pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 11788 bytes