Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c564c5400d66da8…

MALICIOUS

PDF

46.1 KB Created: 2020-08-31 16:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36d41c26df11c8c7ff39baca520ed89d SHA-1: 104bd4749f0248034422621e4b1744569f73494c SHA-256: 3c564c5400d66da839b87d87301276670e64db1e17875b38dc4efd1c9da1f3be
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as IELTS listening practice material. The ML classifier also strongly indicated maliciousness. The document body contains the malicious URL and text suggesting a lure for IELTS practice, which is a common social engineering tactic. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link points to malicious infrastructure.

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/wix?keyword=ielts+listening+practice+with+answer+sheet
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/le_livre_d_enoch_version_ethiopienn.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/thermal_printer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/tipos_de_diagnostico_empresarial.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/yamaha_town_mate_t50-_t80_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/boxob.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/jikozidefupodijigokedilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/tuxinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/mafilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/43693726489.pdf
    • https://cdn.shopify.com/s/files/1/0434/8608/5277/files/auto_submit_form_in_jsp.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/unikey_4._0_win_7_32bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/44113311764.pdf
    • https://static.usrfiles.com/ugd/963627_08501c512c0f427982965c5041044147.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb87d76275f6410396f818cfa8ea8907.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f957d428584da5bba5d44e72cf1a90.pdf
    • https://static.usrfiles.com/ugd/3e9e83_e569ff7149ff4f5d87de5c48c343629d.pdf
    • https://static.usrfiles.com/ugd/24853a_007acdc4afb6433ba398d735b4398583.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_off00007633.bin
f9be85a962de1b99b7a4a1f7fb6abcd770fea28280eacadca56e5d23534661f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 5224 bytes
font_01_sfnt_off00008807.bin
360718f8a6ccef3cb669e8ca3614ded4a859059b3f0d9e46db3d2a3f8ea09d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8807 10468 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.