Malicious PDF — malware analysis report

Static analysis result for SHA-256 49517219608ebf7d…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 00:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11f5eb9f7eb8ef6cef35b5fa3dd645a6 SHA-1: 23cb3ccbdfb031c96ea232f051dde261b3470604 SHA-256: 49517219608ebf7d8f1d2e546b18ff5fa0b064929eb1ed4f5762c38bf1d4d4cf
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely as part of a phishing or scam campaign. The document body mentions 'Board exam date sheet 2020 class 12', suggesting a lure to attract users interested in exam results. The ML classifier strongly flagged this PDF as malicious, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known 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.cc/wix?keyword=board+exam+date+sheet+2020+class+12
    • https://cdn.shopify.com/s/files/1/0433/1615/0427/files/nogadinifexederel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/31011651595.pdf
    • https://cdn.shopify.com/s/files/1/0454/2867/0620/files/effectiveness_of_performance_appraisal_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/artritis_cronica_degenerativa.pdf
    • https://static.usrfiles.com/ugd/dd4472_2a3161dca9f3447cbf673eda571d0522.pdf
    • https://static.usrfiles.com/ugd/2ca09c_84f872e83ef84f069106dd21f71758a4.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_b0fec4039bfd4c58931e09fad455c11c.pdf
    • https://static.usrfiles.com/ugd/de3d83_05b1441c754a44399a177c680557687c.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/jukuperipinejub.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/mysql_stored_procedure_tutorial_for_beginners.pdf
    • https://static.usrfiles.com/ugd/99a8f2_0405e974f5a1414eb53da99b83fc826d.pdf
    • https://static.usrfiles.com/ugd/0c4177_5f3ab4edd90041c6a612543716b3e8dd.pdf
    • https://static.usrfiles.com/ugd/48d9a1_aa4b03eba34e4d47878e9a0aacca94db.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_off00006abf.bin
2272dd32e8baa86778122e889c869ced2a0e6f28f96060ce399b5befe8a4f9ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 5624 bytes
font_01_sfnt_off00007dbd.bin
c221fd0f78ab65decc1f30365a2546245eefb325de103c826ad3efef99a3de83
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 12360 bytes