Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c50b0c0f90fd9e…

MALICIOUS

PDF

41.2 KB Created: 2020-08-23 04:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bbd52437eaec712b294e8f45cb526a SHA-1: 99755d8fe965371270ace9e25b5aad3781e8dc80 SHA-256: a9c50b0c0f90fd9e6446b048016f7bd5f4c7199aed678996d2026db4c7e01a53
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm and a specific malicious redirector URL, indicating an attempt to direct users to harmful content. The document body, though partially corrupted, includes the text 'Nios 12 marksheet images' and the malicious URL, suggesting a lure to a phishing or scam site. The presence of multiple PDF links and a redirector points towards a campaign distributing malicious content via these links.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=nios+12+marksheet+images
    • http://files.pupfishcafe.com/uploads/1/3/1/6/131606864/varoxapogabeg.pdf
    • http://tatipel.cinderellacares.com/uploads/1/3/2/6/132682787/zimumedepap.pdf
    • http://files.mariamountain.co.uk/uploads/1/3/2/8/132816066/jodak_sonabivatekijul_xuzeg_ponitabofigu.pdf
    • http://files.lilbuddahbebes.ca/uploads/1/3/1/6/131606630/lusoxadax-geberi.pdf
    • http://lilel.friendsofbarrenriverlake.org/uploads/1/3/1/0/131069860/4287082.pdf
    • https://cdn.shopify.com/s/files/1/0428/1987/9068/files/49447706352.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/ankylosis_of_tmj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/dupitipunarujesipapigewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/block_b_nillili_mambo_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/pewige.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/gomal_university_ma_islamiat_date_sheet_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/prc_answer_sheet_sample.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/20358563826.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625c.bin
640b01164d043574c7cd49d21a41507111d3db84b52cf04c2fb807568b2300a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5284 bytes
font_01_sfnt_off00007439.bin
cc81a8bdcae035f38f3c7d711c0e1931aa064491a06408f77e13aeb9b6ea7d46
pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10616 bytes