Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e92f061591b41fb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 00:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa1628929dca09a432f6e55d721f661 SHA-1: 9cffce0dd02e3442e98aa81ad75f52d8ff822c9b SHA-256: 4e92f061591b41fb4163679ed21d1cdc3015295e69f858716fad55b76ce2202a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bluetooth+headphone+delay+android'. This URL is part of a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though partially corrupted, contains the same URL and references to 'wkhtmltopdf', indicating it was likely generated programmatically to host these links. The primary intent appears to be directing users to potentially harmful content via the obfuscated link.

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=bluetooth+headphone+delay+android
    • http://files.aa-waterloo.org/uploads/1/3/1/1/131164295/ratiwaxuraxifu-tenipi-sererokumix.pdf
    • http://files.nc956.com/uploads/1/3/1/8/131856330/4603187.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/1603741528.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/artist_licensing_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/vopizu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/laser_b2_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/rakopelip.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/sikufefazisejajujeripav.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/92066314352.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5813/files/dumukubodapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/31847019527.pdf
    • https://cdn.shopify.com/s/files/1/0429/1333/3411/files/glencoe_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/voluntary_acknowledgment_of_paternity_form_texas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/92760061992.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_off00006425.bin
db2f7d514bccaef6aced2ba8c02320b3839a739519e1903cc4d0743628a9c520
pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 4904 bytes
font_01_sfnt_off000074c7.bin
c0368715d61cc253b57eba0446d00299b34c9c39a6f701d0643796c85f51c31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 10468 bytes
font_02_sfnt_off00009856.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9856 4324 bytes