Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93aa6e5bd31faa4…

MALICIOUS

PDF

50.7 KB Created: 2020-08-01 16:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cbd0d462e55bf0eef07467c87e462d SHA-1: f7d2fa3e5ef486c1dd8ed9293421edd243149b82 SHA-256: a93aa6e5bd31faa47a96d9f8b0842f7c2e7437adb06b3b1fae8d17a1d3712397
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs. One critical heuristic identifies a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=nezha+warframe+build'. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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=nezha+warframe+build
    • http://files.anchorelpaso.com/uploads/1/3/1/4/131408581/vevilukuw-duxabiliwis.pdf
    • http://files.retr-act.com/uploads/1/3/1/3/131398052/kulevozoxima.pdf
    • http://files.frhstrainingconsultants.com/uploads/1/3/0/7/130776142/137f7bd0.pdf
    • http://files.lifeofchristrosary.com/uploads/1/3/2/6/132695633/femorubizabafopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/59661113219.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/samsung_dryer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/74938067326.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/niraraladopej.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2696/files/94053087327.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/zekaferuxanivanujom.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/waxukifusiroritiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/tofovixivugavixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/247244288.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/sudonarinezajaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/63518133564.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/simple_subject_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/luvabemetepaba.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/1/0431/3497/6157/files/nir

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b12.bin
6a6e98deae7c894f5c93418a47aaf555661196ab04e3561181ef1cbd624a6fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B12 4808 bytes
font_01_sfnt_off00008b78.bin
0dc42e50fb9630b250687952490a6167fb6aa3416dfdc2c6635fa76cd7ef3efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B78 10568 bytes
font_02_sfnt_off0000afaf.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAF 4324 bytes