Malicious PDF — malware analysis report

Static analysis result for SHA-256 65151c2112164163…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 22:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aacf505b0b9d74356f652a2d7393132 SHA-1: b8ad2397e894c3c8fc61a87af2763ab6687674b5 SHA-256: 65151c21121641631fe9c10d1b2403ab7429fde32a1bcc313155164488f5cae0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, suggests a lure related to a volunteer form, aiming to trick the user into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm strategy to obscure the malicious destination.

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.com/pify?keyword=brookings+school+district+volunteer+form
    • http://files.ignitepayments-network.com/uploads/1/3/1/4/131411474/6471571d44d642b.pdf
    • http://files.thenewschoolpreschool.com/uploads/1/3/0/7/130775649/652231088af89.pdf
    • http://files.dunlaplacrosse.com/uploads/1/3/1/4/131452942/novaduxo.pdf
    • http://files.hippychic.us/uploads/1/3/2/6/132695365/kulujak-pivovazowe-gupejimeduruguj.pdf
    • http://guxugu.youmakethedifference.net/uploads/1/3/1/4/131408056/kopesokafuko-voduzuwexe-dutazuniw-zebikof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/kedubejajurovezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/pozesebil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/random_shuffle_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4582/files/82390807391.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/best_factions_servers.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/65947698481.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/75094538113.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/zidiluwufatosujuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/xafulawifazosiga.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006210.bin
4ee1344d460adaaae1f36a7c1aa97669143924b40c30fea856f88a5bcd02ff75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 5280 bytes
font_01_sfnt_off000073e2.bin
4ea6799a23c3f7dee1c365790313642c8fe4bdca60c7ac548ccd70db5fe419d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 9936 bytes
font_02_sfnt_off000095e2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E2 4324 bytes

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