Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b95907625885814…

MALICIOUS

PDF

53.0 KB Created: 2020-08-05 16:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd13ca8bd8c2f1efcc13a706f570c159 SHA-1: 51697315b303f746b764e19f54ec7260211ac954 SHA-256: 2b959076258858144dcc0a0365a13dd047fc8181d76bd7c932504bdd98458c4a
128 Risk Score

Malware Insights

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

The PDF contains a deceptive link presented as a download for 'Korean learning books pdf free'. This link, 'https://ttraff.com/pify?keyword=korean+learning+books+pdf+free', redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm designed to obscure the malicious redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=korean+learning+books+pdf+free
    • http://files.fhwellness-ca.com/uploads/1/3/2/3/132302940/vejoxisajefolet.pdf
    • http://files.hillsdalecountychamber.com/uploads/1/3/1/1/131164250/nisafenumade.pdf
    • http://files.quantum-packaging.com/uploads/1/3/1/1/131164546/4057722.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/juxadegamavubozopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/72738863516.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/vuzinuxix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/18144583617.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/46405056076.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/33719221419.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/annotates_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/88758957026.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/42351490976.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/checkbox_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/watupuvawazijujibuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/zotuxutiboz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007237.bin
9b2a507025d84fe76020b7cdfca4dfe860935f8142256837ee3feafa2d92c80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7237 4916 bytes
font_01_sfnt_off00008340.bin
0d4d2c70a3d6adc857142b16953dd181370b952f141d287bf1caca597717c319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 5088 bytes
font_02_sfnt_off00009486.bin
90a938f939d47d7a5764affd2778f320ceb626ca6646b536b7d0045d57cc4a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9486 10556 bytes
font_03_sfnt_off0000b898.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB898 4324 bytes

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