Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a731861434eb75c…

MALICIOUS

PDF

37.1 KB Created: 2020-09-04 04:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa452668d5ca44916927f5329de5e30 SHA-1: ff964e8776de7a038e1d1bf2af0421bd652db6f2 SHA-256: 1a731861434eb75c3af21a29da9944bf87054e61d6f3e8469fce20df78b93602
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for downloading a driver, likely to trick users into visiting the malicious site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent of redirecting users.

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.club/wix?keyword=hp+cd+rom+driver++windows+7
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/vemalikivapem.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/53466146119.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/niruve.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/7th_grade_math_worksheets_free_printable_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2239/3244/files/anti_virus_android_terbaik_2018_tanpa_iklan.pdf
    • https://static.usrfiles.com/ugd/9374a7_e02741e388d74a3aacda63425be149c9.pdf
    • https://static.usrfiles.com/ugd/ce5d00_188103d48c154858a555946a1d2d2c24.pdf
    • https://static.usrfiles.com/ugd/954c8b_b8132ae520844288b4ce0c03beecf1f9.pdf
    • https://static.usrfiles.com/ugd/7baf93_6a3b5cba8d9748e3843b4a5183ed4883.pdf
    • https://static.usrfiles.com/ugd/91e123_4c48591b62cd444e8a3557f421895b7d.pdf
    • https://static.usrfiles.com/ugd/33a2e4_f7c03d3834f84b7c953b18dd12eaec61.pdf
    • https://static.usrfiles.com/ugd/77d535_c203ec89856f4d68912be25314c747be.pdf
    • https://static.usrfiles.com/ugd/868b90_97d016b2c19b44468e6bddefc2615dac.pdf
    • https://static.usrfiles.com/ugd/77941b_7ff424b4d80d4706aaba53384450df38.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_off00005393.bin
aa6d9b6bae0d45c896563e10ded7a016abcb644765860172943643621b4adb74
pdf-font-stream PDF embedded font (sfnt) at offset 0x5393 5168 bytes
font_01_sfnt_off0000652e.bin
ebe0edaeca5d983cec09542a01b30596fe5a3ab36ffce2b7abb2303539b12638
pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 10136 bytes