Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f4432b5d40c595…

MALICIOUS

PDF

65.7 KB Created: 2020-08-23 18:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6dec9f0ee4b6caec350dd8012b57ea3 SHA-1: f17e6d44f67eb3b94655d17a188a851c821a3149 SHA-256: e2f4432b5d40c5959b18272dd5582acfae3824f389f0c9b0a575280bf88ba958
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to shopify.com, one of which is the first URL listed. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=very+little+nightmares++android+original', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=very+little+nightmares++android+original
    • http://vulugeno.youngspirits.com/uploads/1/3/0/7/130775052/mimawor-jabejo.pdf
    • http://lerivekul.pattoh.com/uploads/1/3/0/8/130813988/1fe215f3f95.pdf
    • http://files.steveneparry.com/uploads/1/3/2/6/132681504/xadirosu.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/talking_as_fast_as_i_can_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/52321085417.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/wivusot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/macbook_pro_bluetooth_not_available.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/2_digit_by_1_digit_multiplication_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/bojatobapotamuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/xeweferiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/plastic_degrading_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/98594099987.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/offline_calling_apps_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b700.bin
288b00725679e48585a775360d8f702d05d4b1d5e07351b2ed80b833f751760d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB700 5092 bytes
font_01_sfnt_off0000c816.bin
4c26dda814e41c93a941a04ac216c499111e55f96a77d35c18545ce2920f3a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC816 10364 bytes
font_02_sfnt_off0000eb9f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 4324 bytes

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